VAN 221: Veterinary Splanchnology and Applied Anatomy (1+1)

OMENTUM

Ox

• These are two in number -the greater and the lesser
• The greater omentum conceals the greater part of the intestine on the right side except duodenum and covers the ventral sac of the rumen almost entirely

• It is composed of two layers, 
  • The superficial layer extends from the left longitudinal groove of the rumen, curves ventrally around the ventral sac of the rumen, and ascends to the right side covering the deep layer of the omentum. It ends along the second part of the duodenum and the greater curvature of the abomasum
  • The deep layer is attached along the visceral surface of the rumen ventral to the right longitudinal groove of the rumen and curves around the intestinal mass on the right side and is covered by the superficial part. It ends chiefly by blending with the medial layer of meso-duodenum but cranially it is attached on the first bend of the colon and the visceral surface of the liver along the ventral border of the pancreas.The two parts are continuous at the attachment along the caudal transverse groove of the rumen
• The superficial and deep layers thus enclose a potential space, the omental bursa. The greater omentum stores considerable amount of fat
• The lesser omentum is a double fold extending from the liver (oesophageal notch to portal fissure) to the parietal surface of the omasum, pyloric part of the abomasum and the first part of duodenum