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

Extents

• 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

Contents

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