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Anatomy & Course of main portal vein Bro I want points for this based on year 1 MBBS student on GIT system . Then I want summarise points of u given for me to add in my eposter in an area of it. And if can pls use the points based on what I asked from this slide

Reading File
Reading File
Reading File
Running Command

cd /tmp/workspace && mkdir -p portal_vein && python3 -c " import pdfplumber with pdfplumber.open('/tmp/workspace/attachments/ada65072-711a-422d-974e-e244c96535ca/L9.pdf') as pdf: print('pages', len(pdf.pages)) for i, page in enumerate(pdf.pages): text = page.extract_text() print(f'--- PAGE {i+1} ---') print(text) "

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Finding Sources
Reading File
I have enough textbook detail (Gray's Anatomy for Students) plus the exact slide content from the L9.pdf (pages 32-35, "Portal Vein" section). Let me also grab a good anatomical image for the poster.
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hepatic portal vein formation tributaries splenic superior mesenteric vein diagram

Portal Vein — Anatomy & Course (Year 1 MBBS, GIT System)

Based on your L9.pdf slide (pages 32–35, "Portal Vein") plus standard anatomy textbook detail for context.

1. Detailed Study Points

Definition / Function
  • The hepatic portal vein is the main vessel draining venous blood from the abdominal GIT, spleen, pancreas, and gallbladder into the liver.
  • Carries nutrient-rich (but deoxygenated) blood — supplies about 70% of liver blood flow (the remaining 30% is oxygenated blood from the hepatic artery).
  • Functional significance: because gut venous blood drains directly into the liver via this vein, the liver is a common site for secondary spread of gut infections and cancers (portal metastasis) - L9.pdf, p. 44.
Formation
  • Formed by the union of the splenic vein and the superior mesenteric vein (SMV), behind the neck of the pancreas.
  • The inferior mesenteric vein usually joins the splenic vein (at a right angle) before this union, rather than joining the portal vein directly - L9.pdf, p. 34.
  • Textbook detail: formation occurs at the level of vertebra L2 - Gray's Anatomy for Students, p. 416.
Course
  • From its origin behind the pancreatic neck, it ascends posterior to the superior (first) part of the duodenum.
  • Enters the right free margin of the lesser omentum, running within the portal triad.
  • Within the lesser omentum it lies posterior to (deep to) both the bile duct and the hepatic artery proper - L9.pdf, p. 33:
    • Bile duct - lies to its right (anterior)
    • Hepatic artery proper - lies to its left (anterior)
    • Portal vein - lies posterior/deep to both
  • It is also anterior to the epiploic (omental) foramen of Winslow.
  • On reaching the porta hepatis (hilum of the liver), it divides into right and left branches that enter the liver substance along with branches of the hepatic artery and bile duct, supplying the functional right and left lobes respectively.
Tributaries
  • Splenic vein
  • Superior mesenteric vein
  • Left and right gastric veins (draining the lesser curvature of stomach/oesophagus)
  • Cystic vein (from gallbladder)
  • Para-umbilical veins (linked to the obliterated umbilical vein/ligamentum teres — clinically important in portal hypertension, e.g. caput medusae)
Applied/Clinical Anatomy
  • Portal vein forms part of the portal triad (portal vein + hepatic artery proper + bile duct) within the porta hepatis.
  • Site of portosystemic anastomoses important in portal hypertension (oesophageal varices, caput medusae, rectal varices).
  • Relevant to portal vein thrombosis and to surgical procedures like the Pringle manoeuvre (temporary occlusion of the portal triad to control bleeding).
Portal vein and its tributaries

2. Condensed Summary for Your E-Poster

Short, poster-friendly version you can drop into one section/box:
PORTAL VEIN — Anatomy & Course
  • Drains blood from GIT, spleen, pancreas, gallbladder → liver (~70% of liver's blood supply)
  • Formed by union of splenic vein + superior mesenteric vein, behind the neck of pancreas (level of L2)
  • Course: ascends behind 1st part of duodenum → enters right free margin of lesser omentum → lies posterior to bile duct (right) and hepatic artery (left) in the portal triad
  • At porta hepatis, divides into right & left branches entering the liver
  • Tributaries: splenic vein, SMV, left/right gastric veins, cystic vein, para-umbilical veins
  • Clinical relevance: portal hypertension → varices/caput medusae; route for gut infection/cancer spread to liver; portal vein thrombosis
This keeps the same content and terminology used in your lecture slide (L9.pdf) so it stays consistent with what your batch was taught, while adding the L2 vertebral level and lesser-omentum relations for extra precision.
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