The mesentry  

This is a peritoneal fold that suspends the intestines from the posterior abdominal wall.

Parts of the intestine with mesentry


  • Jejunum

  • Ileum

  • Appendix: Meso-appendix

  • Transverse colon : Transverse mesocolon

  • Sigmoid colon : Sigmoid mesocolon



Mesentery of the  small intestine


  • Directed obliquely and inferiorly and to the right

  • From the left side of L2 to the right sacroiliac joint.

Structures crossed

  • Horizontal part of the duodenum
  • Aorta
  • Inferior vena cava
  • psoas major muscle
  • Right ureter
  • Right testicular or ovarian vessels
  • Genitofemoral nerve


  • Jejunal and ileal blood vessels
  • Mesenteric nodes and lymph vessels
  • Nerves
  • Extraperitoneal fatty tissue.
  • Superior mesenteric artery and vein

The Peritoneum