Difference between revisions of "Jejunum - Anatomy & Physiology"

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**It is rich in the products of digestion following a meal.
 
**It is rich in the products of digestion following a meal.
 
**The portal vein enters the [[Liver - Anatomy & Physiology|liver]].
 
**The portal vein enters the [[Liver - Anatomy & Physiology|liver]].
 
==Innervation==
 
 
 
==Lymphatics==
 
 
  
 
==Histology==
 
==Histology==

Revision as of 15:00, 10 July 2008

BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY
BACK TO SMALL INTESTINE - ANATOMY AND PHYSIOLOGY


Introduction

Structure

Jejunum(Dog) - Copywright RVC 2008
  • The jejunum is the longest part of the small intestine.
  • It is highly coiled and occupies the ventral part of the abdominal cavity, filling those parts that are not occupied by other viscera. This produces species variation (see comparative aspects).
  • It is suspended by the mesentry (mesojejunum). This conveys the blood vessels and nerves and houses lymph nodes.
    • The mesentry converges to its root. This is where the cranial mesenteric artery branches off from the aorta.

Function

  • Has digestive and absorptive functions.

Vasculature

  • The cranial mesenteric artery, a branch of the abdominal aorta, supplies blood to the jejunum, ileum, caecum, ascending colon and part of the transverse colon.
  • It branches greatly within the mesenty of the jejunum.
    • There are many anastomoses within the mesentry, which ensure that the intestine can survive even if a major division of the cranial mesenteric is damaged.
  • The cranial mesenteric vein drains blood from the jejunum and enters the portal vein.
    • It is rich in the products of digestion following a meal.
    • The portal vein enters the liver.

Histology

Species Differences

Links