Detailed colour medical diagram for MBBS pathology exam showing atherosclerosis pathogenesis steps: Step 1 normal artery with endothelium, smooth muscle, adventitia labeled; Step 2 endothelial injury with LDL entering intima; Step 3 fatty streak with foam cells (macrophages filled with lipid) shown in yellow; Step 4 fibrous plaque with fibrous cap (collagen, SMC) in blue, lipid core in yellow, necrotic debris, foam cells; Step 5 complicated plaque showing calcification, ulceration, thrombosis. Also show risk factors box: hypertension, smoking, hyperlipidemia, diabetes, age. Colour-coded arrows showing progression. Clean, exam-ready medical illustration style with clear labels.

Colour medical diagram for MBBS pathology exam showing Rheumatic Heart Disease: Left panel shows Group A Streptococcal pharyngitis leading to molecular mimicry with heart antigens; Middle panel shows Aschoff body (pathognomonic) with Anitschkow cells (caterpillar cells), Aschoff giant cells, lymphocytes, central fibrinoid necrosis - all labelled with arrows; Right panel shows mitral valve cross section with fish-mouth stenosis, McCallum patch on left atrium, small warty vegetations along line of closure, leaflet fusion and thickening. Bottom panel shows extracardiac lesions: pericarditis (bread and butter), Sydenham chorea, subcutaneous nodules, erythema marginatum. Colourful exam diagram with Jones criteria listed.

Colour medical diagram for MBBS pathology exam showing Myocardial Infarction timeline and morphological changes: A timeline from 0-6 weeks showing: 0-4 hours (no gross change, wavy fibers microscopically); 4-12 hours (dark mottling begins); 12-24 hours (pale infarct with early coagulative necrosis, neutrophil infiltration); 1-3 days (pallor, yellow-white, neutrophils peak); 3-7 days (hyperemic border, macrophages appear); 1-3 weeks (granulation tissue, red-pink); 3-8 weeks (white fibrous scar). Second panel shows ECG changes: ST elevation, Q wave, T wave inversion. Third panel shows lab enzymes: Troponin I/T rises at 3-6 hrs peaks 24 hrs; CK-MB rises 4-6 hrs peaks 24 hrs; LDH rises 24 hrs peaks 3-6 days. Clear colour-coded timeline with microscopic features labeled.

Colour medical diagram for MBBS pathology exam comparing: Left side Hyaline Arteriosclerosis (pink hyaline material depositing in vessel wall, homogeneous eosinophilic thickening, seen in benign hypertension and diabetes, small arteries and arterioles affected) versus Right side Hyperplastic Arteriosclerosis (onion skin concentric layering of SMC proliferation, severe narrowing of lumen, seen in malignant hypertension, fibrinoid necrosis of vessel wall shown in red). Both drawn as vessel cross-sections with arrows pointing to key features. Table at bottom comparing: cause, vessel type, microscopy, clinical setting, outcome. Clean medical illustration style with clear labels and colour coding.

Colour medical diagram for MBBS pathology exam showing Aneurysm types: 1) True aneurysm - all 3 layers involved (intima red, media yellow, adventitia blue); 2) False/Pseudo aneurysm - wall defect with hematoma communicating with lumen; 3) Saccular aneurysm - focal outpouching with thrombus; 4) Fusiform aneurysm - circumferential dilation; 5) Dissecting aneurysm - blood in media splitting layers. Separate panel showing Abdominal Aortic Aneurysm (AAA): infrarenal location, atherosclerotic plaques, mural thrombus, expanded diameter greater than 3cm, risk of rupture shown. Causes listed: atherosclerosis, Marfan syndrome, syphilis (ascending aorta). Colourful exam-ready diagram.