1st Year MBBS Anatomy - Abdomen & Pelvis + Lower Limb

Complete Question Bank: LAQ | Reasoning/Applied | Short Note | Applied Reasoning | Embryology & Histology (with Labels)

PART 1: ABDOMEN & PELVIS

SECTION A: LONG ANSWER QUESTIONS (LAQ)

Anterior Abdominal Wall

1. Describe the inguinal canal - its formation, walls, contents, and applied anatomy
2. Describe the rectus sheath - formation, contents, and clinical significance
3. Describe the inguinal ligament and its derivatives with applied anatomy
4. Describe the layers of the anterior abdominal wall with their nerve supply and blood supply

Peritoneum

1. Describe the peritoneum - its subdivisions, reflections, and recesses. Add a note on peritoneal dialysis
2. Describe the lesser sac (omental bursa) - boundaries, communications, and clinical importance
3. Describe the greater omentum - development, blood supply, and functions (policeman of the abdomen)
4. Describe the mesenteries of the gut with their attachments and clinical significance

Stomach

1. Describe the stomach in detail - position, relations, blood supply, nerve supply, lymphatic drainage, and applied anatomy
2. Describe the blood supply of the stomach and its clinical significance (gastric ulcer, gastrectomy)

Small Intestine

1. Describe the duodenum - parts, relations, blood supply, and applied anatomy
2. Describe the jejunum and ileum - differences and applied anatomy (Meckel's diverticulum)

Large Intestine

1. Describe the colon - parts, features, blood supply, and applied anatomy
2. Describe the appendix - position, blood supply, McBurney's point, and referred pain

Liver

1. Describe the liver - surfaces, lobes, relations, blood supply, venous drainage, nerve supply, lymphatics, and applied anatomy
2. Describe the porta hepatis and structures passing through it
3. Describe the portal vein - formation, tributaries, portocaval anastomoses, and applied anatomy (portal hypertension)

Gall Bladder and Bile Duct

1. Describe the gall bladder - relations, blood supply, and applied anatomy (cholecystitis, Calot's triangle)
2. Describe the extrahepatic biliary apparatus - components, relations, and applied anatomy

Pancreas

1. Describe the pancreas - parts, relations, blood supply, and applied anatomy (pancreatitis, carcinoma head of pancreas)

Spleen

1. Describe the spleen - position, surfaces, relations, blood supply, and applied anatomy (splenomegaly, splenectomy)

Kidneys

1. Describe the kidneys - position, relations (anterior and posterior), blood supply, nerve supply, and applied anatomy
2. Describe the renal fascia (Gerota's fascia) and perinephric fat - clinical significance
3. Describe the ureter - course, relations, constrictions, blood supply, and applied anatomy (ureteric calculus)

Adrenal (Suprarenal) Glands

1. Describe the suprarenal glands - position, relations, blood supply, and applied anatomy

Aorta and IVC

1. Describe the abdominal aorta - course, branches, and applied anatomy
2. Describe the inferior vena cava - formation, tributaries, and applied anatomy

Diaphragm

1. Describe the diaphragm - attachments, openings and structures passing through, nerve supply, blood supply, and applied anatomy (hiatus hernia)

Celiac Plexus and Lumbar Plexus

1. Describe the lumbar plexus - formation, branches, and applied anatomy
2. Describe the celiac plexus - formation, distribution, and clinical significance

Male Pelvis

1. Describe the male urethra - parts, relations, sphincters, and applied anatomy (catheterization, rupture)
2. Describe the prostate gland - lobes, relations, blood supply, and applied anatomy (BPH, carcinoma)
3. Describe the urinary bladder - relations (full and empty), blood supply, nerve supply, and applied anatomy

Female Pelvis

1. Describe the uterus - position, relations, blood supply, supports, and applied anatomy (prolapse, fibroids)
2. Describe the broad ligament - contents, subdivisions, and clinical significance
3. Describe the round ligament - course, contents, and applied anatomy
4. Describe the ovary - position, relations, blood supply, lymphatics, and applied anatomy
5. Describe the fallopian tube - parts, relations, blood supply, and applied anatomy (ectopic pregnancy)
6. Describe the pelvic floor - muscles, nerve supply, and applied anatomy (perineal tear, prolapse)

Pelvic Joints and Walls

1. Describe the sacroiliac joint - type, ligaments, movements, and applied anatomy
2. Describe the pelvic walls and floor with their muscles and clinical significance

Perineum

1. Describe the ischiorectal (ischioanal) fossa - boundaries, contents, and applied anatomy (abscess, fistula-in-ano)
2. Describe the anal canal - parts, blood supply, nerve supply, lymphatics, and applied anatomy (hemorrhoids, fistula, carcinoma)
3. Describe the male perineum and external genitalia - deep perineal pouch contents and applied anatomy
4. Describe the female perineum - vulva, Bartholin glands, and applied anatomy

Lymphatics

1. Describe the lymphatic drainage of the abdomen - cisterna chyli, thoracic duct, and applied anatomy
2. Describe the lymphatic drainage of the gut

SECTION B: SHORT NOTES - ABDOMEN & PELVIS

1. McBurney's point and its significance
2. Meckel's diverticulum - rule of 2s
3. Calot's triangle - boundaries and contents
4. Portal hypertension and portocaval anastomoses
5. Referred pain in the abdomen
6. Lobes of the liver and their surgical significance
7. Epiploic foramen (foramen of Winslow) - boundaries
8. Posterior relations of the stomach (stomach bed)
9. Superior mesenteric artery syndrome
10. Nutcracker phenomenon
11. Psoas abscess
12. Femoral hernia - boundaries of femoral canal, femoral triangle
13. Inguinal hernia - direct vs indirect differences
14. Hesselbach's triangle
15. Deep inguinal ring vs superficial inguinal ring
16. Coverings of spermatic cord and their embryological equivalents
17. Gubernaculum and its remnant in female
18. Processus vaginalis and its fate
19. Peritoneal pouches in the male and female pelvis
20. Pudendal nerve - course and applied anatomy (pudendal block)
21. Obturator nerve - course and applied anatomy
22. Lumbosacral trunk
23. Urogenital diaphragm (perineal membrane) - contents
24. Perineal body (central tendon of perineum)
25. Rectovesical pouch and rectouterine pouch (pouch of Douglas)
26. Clinical significance of pouch of Douglas
27. Supports of the uterus
28. Pelvic splanchnic nerves (nervi erigentes)
29. Hypogastric plexus
30. Presacral neurectomy
31. Arcuate line (linea semicircularis)
32. Spigelian hernia
33. Umbilical hernia and paraumbilical hernia
34. Nerve supply of the urinary bladder and micturition reflex
35. Fascial compartments of the penis
36. Lymphatics of the testis vs scrotum
37. Descent of the testis
38. Tributaries of the portal vein
39. Bare area of the liver
40. Ligamentum teres and ligamentum venosum
41. Subphrenic spaces
42. Duodenojejunal flexure (ligament of Treitz)
43. Blood supply of the rectum and anal canal
44. Extraperitoneal structures - retroperitoneal organs
45. Hilum of the kidney - structures in order
46. Left suprarenal gland vs right suprarenal gland
47. Phrenic nerve - course and applied anatomy
48. Crura of the diaphragm
49. Aortic hiatus vs esophageal hiatus vs caval opening
50. Applied anatomy of the femoral sheath

SECTION C: APPLIED / REASONING SHORT NOTES - ABDOMEN & PELVIS

1. Why is indirect inguinal hernia more common in males? - Explain with processus vaginalis and descent of testis
2. Why is right-sided inguinal hernia more common? - Later descent of right testis
3. Why does femoral hernia occur more in females? - Wider pelvis, femoral canal dimensions
4. Why is portal hypertension followed by splenomegaly and ascites? - Portal venous anatomy
5. Why does carcinoma of head of pancreas cause painless obstructive jaundice? - CBD compression at head
6. Why is pain of appendicitis initially periumbilical? - Referred pain via T10 dermatome
7. Why does ureteric colic radiate to the groin, scrotum/labia? - Same nerve supply as genitofemoral nerve (L1, L2)
8. Why does adrenal left vein drain into renal vein while right drains directly into IVC? - Developmental asymmetry
9. Why is the left testicular vein longer and drains at a right angle into renal vein making varicocele more common on the left?
10. Why does carcinoma of body/tail of pancreas present late? - No early obstructive features
11. Why does hiatus hernia cause GERD? - Disruption of gastroesophageal junction
12. Why is splenic rupture dangerous? - Rich blood supply, capsule properties
13. Why does a posterior duodenal ulcer cause more serious bleeding? - Gastroduodenal artery erosion
14. Why does posterior gastric perforation lead to lesser sac collection?
15. Why does the rectum not have taenia coli, haustra, or appendices epiploicae? - Structural features of colon vs rectum
16. Why is the pelvic ureter at risk during hysterectomy? - Crossing of uterine artery
17. Why is the prostate gland drained by lymphatics to internal iliac nodes while testes drain to para-aortic nodes? - Developmental origin difference
18. Why does BPH obstruct urine flow? - Median lobe enlargement compresses urethra
19. Why is the posterior fornix of vagina the most dependent part for ectopic pregnancy rupture collection? - Pouch of Douglas
20. Why is Meckel's diverticulum clinically significant? - Rule of 2s, peptic ulceration from ectopic gastric mucosa

SECTION D: EMBRYOLOGY - ABDOMEN & PELVIS

Long Answer Questions (Embryology)

1. Describe the development of the gut - foregut, midgut, hindgut with clinical correlations
2. Describe the development of the stomach and its rotations with clinical significance
3. Describe the development of the liver and biliary apparatus with anomalies
4. Describe the development of the pancreas (dorsal and ventral) with anomalies (annular pancreas, pancreas divisum)
5. Describe the development of the midgut - rotation, fixation, and anomalies (malrotation, volvulus, Meckel's diverticulum)
6. Describe the development of the urinary system - pronephros, mesonephros, metanephros, and anomalies
7. Describe the development of the kidney - ascent, rotation, and anomalies (horseshoe kidney, pelvic kidney, duplex ureter)
8. Describe the development of the gonads and genital ducts in both sexes with differentiation
9. Describe the descent of the testis and its anomalies (cryptorchidism, ectopic testis)
10. Describe the development of the uterus, vagina, and anomalies (bicornuate uterus, septate uterus, vaginal atresia)
11. Describe the development of the urorectal septum, cloacal membrane, and their divisions
12. Describe the development of the anterior abdominal wall and umbilicus with anomalies (gastroschisis, omphalocele, patent urachus)
13. Describe the development of the peritoneum and mesenteries
14. Describe the development of the suprarenal gland

Short Notes (Embryology)

1. Vitelline duct (omphalomesenteric duct) and its remnants
2. Physiological umbilical herniation - stages and timing
3. Annular pancreas - development and clinical features
4. Hirschsprung's disease (congenital aganglionic megacolon) - neural crest cell migration failure
5. Rotation of the midgut - degrees of rotation
6. Foregut, midgut, hindgut boundaries and derivatives
7. Development of the spleen - dorsal mesogastrium
8. Müllerian duct (paramesonephric duct) and its derivatives
9. Wolffian duct (mesonephric duct) and its derivatives
10. Gubernaculum - role in testicular and ovarian descent
11. Patent urachus and urachal cysts
12. Ectopia vesicae (bladder exstrophy) - development
13. Hypospadias vs epispadias - developmental basis
14. Development of external genitalia - indifferent stage and differentiation
15. Cloacal membrane and proctodeum
16. Atresia of the gut (duodenal atresia, jejunal atresia) - causes
17. Congenital pyloric stenosis - hypertrophy of pyloric sphincter
18. Persistence of processus vaginalis - types of hydrocele
19. Intersex states - true hermaphroditism, male pseudohermaphroditism
20. Development of the diaphragm - pleuroperitoneal membrane and anomalies (CDH - congenital diaphragmatic hernia)

What to Label (Embryology Diagrams - Abdomen & Pelvis)

SECTION E: HISTOLOGY - ABDOMEN & PELVIS

Short Notes (Histology)

1. Histology of the esophagus - layers and special features (non-keratinized stratified squamous epithelium)
2. Histology of the stomach - layers, gastric glands, cell types (chief cells, parietal cells, mucous cells, G cells)
3. Histology of the duodenum - Brunner's glands, villi, crypts of Lieberkühn
4. Histology of the jejunum - tall villi, plicae circulares, goblet cells
5. Histology of the ileum - shorter villi, Peyer's patches, goblet cells more numerous
6. Histology of the large intestine - no villi, crypts prominent, abundant goblet cells, taenia coli
7. Histology of the appendix - lymphoid nodules, narrow lumen, no villi
8. Histology of the liver - hepatic lobule, portal triad, sinusoids, central vein, space of Disse, Kupffer cells
9. Histology of the gall bladder - simple columnar epithelium, Rokitansky-Aschoff sinuses, no muscularis mucosae, no submucosa
10. Histology of the pancreas - exocrine (acini, centroacinar cells, intercalated ducts) vs endocrine (islets of Langerhans: α, β, δ cells)
11. Histology of the kidney - cortex (glomerulus, Bowman's capsule, PCT, DCT), medulla (loop of Henle, collecting duct), juxtaglomerular apparatus
12. Histology of the suprarenal gland - cortex (zona glomerulosa, zona fasciculata, zona reticularis) vs medulla (chromaffin cells)
13. Histology of the ureter - transitional epithelium (urothelium), inner longitudinal and outer circular smooth muscle, adventitia
14. Histology of the urinary bladder - transitional epithelium, detrusor muscle (3 layers), umbrella cells
15. Histology of the testis - seminiferous tubules (Sertoli cells, spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids, spermatozoa), interstitial cells of Leydig
16. Histology of the epididymis - pseudostratified columnar epithelium with stereocilia
17. Histology of the uterus - endometrium (functional and basal layers, simple columnar epithelium, uterine glands, stroma), myometrium, perimetrium
18. Histology of the ovary - germinal epithelium, tunica albuginea, cortex (follicles at various stages), medulla
19. Histology of the spleen - red pulp (sinusoids, splenic cords of Billroth), white pulp (PALS, Malpighian corpuscle, marginal zone)
20. Histology of the lymph node - capsule, cortex (primary follicles, secondary follicles with germinal center), paracortex, medulla (medullary cords, medullary sinuses), hilum

What to Label (Histology Diagrams - Abdomen & Pelvis)

PART 2: LOWER LIMB

SECTION A: LONG ANSWER QUESTIONS (LAQ) - LOWER LIMB

Bones and Joints

1. Describe the hip joint - type, articular surfaces, capsule, ligaments, blood supply, nerve supply, movements, relations, and applied anatomy (dislocation, fracture neck of femur)
2. Describe the knee joint - type, articular surfaces, capsule, ligaments (intracapsular and extracapsular), menisci, bursae, locking and unlocking mechanism, blood supply, nerve supply, and applied anatomy
3. Describe the ankle joint (talocrural joint) - type, articular surfaces, capsule, ligaments, movements, and applied anatomy (sprain, fractures)
4. Describe the subtalar joint and inversion/eversion of the foot with applied anatomy (flat foot, club foot)
5. Describe the arches of the foot - medial longitudinal arch, lateral longitudinal arch, transverse arch - supports, clinical significance (flat foot, pes cavus)

Muscles - Gluteal Region

1. Describe gluteus maximus - origin, insertion, nerve supply, actions, and applied anatomy (intramuscular injection site)
2. Describe the short external rotators of the hip and their applied anatomy (piriformis syndrome)
3. Describe gluteus medius and gluteus minimus - origin, insertion, nerve supply, actions, and applied anatomy (Trendelenburg sign and gait)

Muscles - Thigh

1. Describe the quadriceps femoris - components, origin, insertion, nerve supply, and applied anatomy
2. Describe the adductor group of muscles - components, nerve supply, and clinical significance (adductor canal, Hunter's canal)
3. Describe the hamstring muscles - components, origin, insertion, nerve supply, and applied anatomy (hamstring injury)
4. Describe the femoral triangle - boundaries, floor, roof, contents, and applied anatomy (femoral artery puncture, femoral hernia)
5. Describe the adductor (Hunter's) canal - boundaries, contents, and applied anatomy
6. Describe the popliteal fossa - boundaries, roof, floor, contents, and applied anatomy (popliteal aneurysm, Baker's cyst)

Muscles - Leg

1. Describe the muscles of the anterior compartment of the leg - components, nerve supply, actions, and applied anatomy (foot drop)
2. Describe the muscles of the posterior compartment of the leg - superficial and deep - nerve supply, actions, and applied anatomy
3. Describe the muscles of the lateral (peroneal) compartment - nerve supply, actions, and applied anatomy (eversion of foot)
4. Describe the extensor retinacula and flexor retinacula of the ankle with the structures passing beneath them

Nerves

1. Describe the femoral nerve - origin, course, branches, distribution, and applied anatomy (femoral nerve injury, femoral nerve block)
2. Describe the obturator nerve - origin, course, branches, distribution, and applied anatomy (obturator hernia, referred pain in hip disease)
3. Describe the sciatic nerve - origin, course, relations, branches, and applied anatomy (sciatic nerve injury, sciatica)
4. Describe the common peroneal (fibular) nerve - origin, course, branches, and applied anatomy (foot drop, nerve injury at neck of fibula)
5. Describe the tibial nerve - origin, course, branches, and applied anatomy (tarsal tunnel syndrome)
6. Describe the lumbosacral plexus - formation, branches, and applied anatomy
7. Describe the sacral plexus - formation, branches, and applied anatomy

Blood Vessels

1. Describe the femoral artery - origin, course, branches, and applied anatomy (femoral artery cannulation, femoral pulse)
2. Describe the popliteal artery - origin, course, branches, and applied anatomy (popliteal aneurysm, intermittent claudication)
3. Describe the arterial supply of the lower limb - anastomoses around the hip and knee
4. Describe the venous drainage of the lower limb - superficial (great and small saphenous veins) and deep veins, perforating veins, and applied anatomy (varicose veins, DVT)
5. Describe the lymphatic drainage of the lower limb - superficial and deep, inguinal lymph nodes, and applied anatomy

Fascia and Compartments

1. Describe the fascial compartments of the leg and their contents - applied anatomy (compartment syndrome)
2. Describe the fascia lata - iliotibial tract and its clinical significance

SECTION B: SHORT NOTES - LOWER LIMB

1. Femoral sheath - formation, compartments, femoral canal, femoral ring
2. Femoral canal - boundaries, contents, clinical significance
3. Cruciate ligaments of the knee - anterior and posterior - functions and injury
4. Medial and lateral menisci - differences and clinical significance (meniscal tear)
5. Unhappy triad (O'Donoghue's triad) of the knee
6. Locking and unlocking of the knee joint
7. Bursae around the knee joint - clinically important ones
8. Screw home mechanism of the knee
9. Coxa vara and coxa valga - angle of inclination
10. Angle of anteversion of the femoral neck
11. Trendelenburg sign and Trendelenburg gait - mechanism
12. Nerve supply of the hip joint - Hilton's law applied
13. Blood supply of the head of femur - avascular necrosis
14. Q angle (quadriceps angle) and its significance
15. Iliotibial band friction syndrome
16. Patella - ossification, bipartite patella, patellar reflex
17. Great saphenous vein - course, tributaries, perforators, and clinical significance
18. Small saphenous vein - course and tributaries
19. Deep vein thrombosis (DVT) - Virchow's triad, Homans' sign
20. Varicose veins - mechanism, saphenofemoral junction
21. Popliteal pulse - clinical examination
22. Posterior tibial pulse - tarsal tunnel location
23. Dorsalis pedis artery - course and palpation
24. Lateral cutaneous nerve of the thigh - meralgia paresthetica
25. Saphenous nerve - course and applied anatomy
26. Sural nerve - formation and applied anatomy (nerve graft)
27. Superior gluteal nerve vs inferior gluteal nerve
28. Piriformis syndrome and sciatic nerve
29. Deep peroneal (fibular) nerve - first web space sensation
30. Superficial peroneal nerve - dorsum of foot sensation
31. Tarsal tunnel syndrome - tibial nerve compression
32. Intramuscular injection in gluteal region - safe quadrant
33. Morton's neuroma
34. Plantar fasciitis
35. Achilles tendon (tendo calcaneus) - clinical significance (Achilles tendinitis, rupture)
36. Peroneal (fibular) retinacula
37. Extensor hallucis longus and its applied anatomy (hallux valgus)
38. Sartorius muscle - "tailor's muscle" - all features
39. Tensor fascia lata - origin, insertion, actions
40. Pectineus - dual nerve supply
41. Obturator internus - nerve supply (nerve to obturator internus)
42. Nerve to quadratus femoris
43. Foot drop - causes, muscles affected, nerve involved
44. Claw toes vs hammer toe - differences
45. Pes planus (flat foot) - causes and supports of medial longitudinal arch
46. Club foot (talipes equinovarus) - deformities
47. Femoral nerve stretch test vs straight leg raise test
48. Compartment syndrome of the leg - Volkmann's ischemia equivalent
49. Ostiofascial compartments of the thigh
50. Knee aspiration - suprapatellar bursa

SECTION C: APPLIED / REASONING SHORT NOTES - LOWER LIMB

1. Why does sciatic nerve injury at the gluteal region cause total loss of all movements below the knee? - All branches affected
2. Why does common peroneal nerve injury at the neck of fibula cause foot drop? - Deep peroneal nerve to dorsiflexors
3. Why does foot drop cause "steppage gait"? - To compensate for inability to dorsiflex
4. Why is the blood supply to the femoral head vulnerable in fracture neck of femur? - Retinacular vessels and their anatomy
5. Why is avascular necrosis common after intracapsular fracture of the neck of femur and not extracapsular? - Intracapsular position of retinacular vessels
6. Why does hip dislocation (posterior) injure the sciatic nerve? - Sciatic nerve proximity posterior to hip joint
7. Why does superior gluteal nerve injury cause Trendelenburg gait? - Gluteus medius/minimus paralysis
8. Why is the intramuscular injection given in the upper outer quadrant of the buttock? - To avoid sciatic and inferior gluteal nerves
9. Why is the great saphenous vein preferred for vascular bypass? - Longest superficial vein, easily accessible, consistent course
10. Why does DVT commonly occur in the lower limb? - Valve-rich system, slow flow, Virchow's triad
11. Why does long saphenous vein incompetence cause varicose veins? - Saphenofemoral junction incompetence, venous hypertension
12. Why is the popliteal artery the most important artery to check in supracondylar fracture of femur? - Artery tethered to bone
13. Why does obturator nerve irritation cause referred pain to the medial aspect of the knee? - Articular branch to the knee
14. Why does medial meniscus tear more often than lateral? - Attached to medial collateral ligament, less mobile
15. Why does the knee joint get locked in full extension? - Screw home mechanism, medial rotation of femur
16. Why is ankle sprain most common on the lateral side? - Lateral ligament weaker than medial (deltoid) ligament
17. Why does eversion injury cause more bone damage (Pott's fracture) than inversion? - Strong deltoid ligament avulses bone rather than tearing
18. Why does flat foot develop? - Failure of tibialis posterior (main dynamic support of medial arch)
19. Why is the saphenous nerve important after great saphenous vein harvest? - Travels with the vein, may be injured
20. Why does proximal fibula fracture (Maisonneuve fracture) injure the common peroneal nerve? - Nerve winds around the neck of fibula

SECTION D: EMBRYOLOGY - LOWER LIMB

Short Notes (Embryology)

1. Development of the lower limb bud - timing, limb bud components (apical ectodermal ridge, zone of polarizing activity, progress zone)
2. Development of the bones of the lower limb from the condensed mesenchyme
3. Rotation of the lower limb bud - preaxial and postaxial borders - medial rotation in lower limb (contrast with lateral in upper limb)
4. Development of the femur - primary and secondary ossification centers
5. Development of the patella - ossification (only secondary center)
6. Development of the knee joint - intraarticular structures from mesenchyme
7. Congenital dislocation of the hip (CDH / developmental dysplasia of hip) - embryological basis
8. Club foot (talipes equinovarus) - developmental basis
9. Limb defects - amelia, phocomelia, hemimelia - causes
10. Polydactyly and syndactyly - developmental basis

What to Label (Embryology Diagrams - Lower Limb)

SECTION E: HISTOLOGY - LOWER LIMB

Short Notes (Histology)

1. Histology of hyaline cartilage (articular cartilage of joints) - matrix, chondrocytes in lacunae, isogenous groups, no perichondrium on articular surface
2. Histology of fibrocartilage (menisci, intervertebral disc) - rows of chondrocytes between collagen bundles, no perichondrium
3. Histology of the synovial membrane - types A and B synoviocytes, vascular loose connective tissue, no basement membrane
4. Histology of dense regular connective tissue (tendons and ligaments) - parallel collagen bundles, tenocytes (fibrocytes) in rows
5. Histology of skeletal muscle - cross striations, peripheral nuclei, endomysium, perimysium, epimysium, A band, I band, H zone, Z line, M line
6. Histology of peripheral nerve (cross-section) - endoneurium, perineurium, epineurium, myelinated vs unmyelinated fibers, Schwann cells, nodes of Ranvier
7. Histology of a large artery (elastic artery) - tunica intima, tunica media (elastic lamellae), tunica adventitia
8. Histology of a medium artery (muscular artery) - internal elastic lamina, smooth muscle media, external elastic lamina
9. Histology of a vein (large vein) - thin walls, large lumen, valves, prominent tunica adventitia
10. Histology of lymph node - (same as above in abdominal section, applied to inguinal nodes)

What to Label (Histology Diagrams - Lower Limb)

MASTER QUICK-REFERENCE SUMMARY TABLE

TIPS FOR EXAM PREPARATION

• LAQs always follow the format: definition/intro → position/location → parts → relations → blood supply → nerve supply → lymphatics → applied anatomy
• Applied/Reasoning questions always explain the "why" - know the anatomical basis for each clinical fact
• Embryology - always mention the week of development, the germ layer of origin, and at least 2-3 anomalies per organ
• Histology labeling - practice identifying the section (LS/TS), the organ, and all labeled structures by their staining characteristics (H&E: eosinophilic vs basophilic, granules, etc.)
• For embryology diagrams - always label arrows showing direction of rotation/migration
• The "rule of 2s" for Meckel's, the "rule of 10s" for pheochromocytoma, and common portocaval anastomosis sites are high-yield clinical correlations

• 45 LAQs - Abdomen & Pelvis (complete answers for all: inguinal canal, rectus sheath, inguinal ligament, abdominal wall layers, peritoneum, lesser sac, greater omentum, mesenteries, stomach, duodenum, jejunum/ileum, colon, appendix, liver, porta hepatis, portal vein, gallbladder, biliary apparatus, pancreas, spleen, kidneys, renal fascia, ureter, suprarenal glands, abdominal aorta, IVC, diaphragm, lumbar plexus, celiac plexus, male urethra, prostate, urinary bladder, uterus, broad ligament, round ligament, ovary, fallopian tube, pelvic floor, sacroiliac joint, pelvic walls, ischiorectal fossa, anal canal, male perineum, female perineum)
• 32 LAQs - Lower Limb (complete answers for all: hip joint, knee joint, ankle joint, subtalar joint, foot arches, gluteus maximus, short external rotators, gluteus medius/minimus, quadriceps, adductors, hamstrings, femoral triangle, adductor canal, popliteal fossa, anterior compartment, posterior compartment, lateral compartment, retinacula, femoral nerve, obturator nerve, sciatic nerve, common peroneal nerve, tibial nerve, lumbosacral plexus, sacral plexus, femoral artery, popliteal artery, arterial supply, venous drainage, lymphatic drainage, fascial compartments, fascia lata)