THE PERITONEUM 443 
to 30 cm.) on the small colon. It then forms an acute angle, passes medially and 
forward along the small colon to the dorsal part of the hilus of the spleen, where it 
blends with the suspensory igament of the latter, and forms a recess (Recessus 
lienalis) behind the saccus czecus of the stomach. It now passes along the hilus 
of the spleen, and is continued to the greater curvature of the stomach by the 
gastro-splenic omentum. It is convenient to regard the spleen as being interca- 
lated in the left part of the greater omentum; on this basis the gastro-splenic 
omentum would be that part of the greater omentum which connects the hilus of 
the spleen with the greater curvature of the stomach. The greater omentum is 
relatively small in the horse, and is 
usually not visible when the abdo- , 
men is opened. It is generally folded 
up in the space between the visceral 
surface of the stomach and the in- 
testine.! 
The lesser sac furnishes the perito- 
neal covering for: (1) the visceral surface 
of the stomach and a small area of the first 
curve of the duodenum; (2) a large part of 
the dorsal surface of the pancreas and por- 
tal vein; (3) a small part of the visceral sur- 
face of the liver above the attachment of 
the lesser omentum and the portal fissure; 
(4) the posterior vena cava, from the level 
of the epiploic foramen to its passage 
through the diaphragm (in so far as it is 
not embedded); (5) the part of the parie- 
tal surface of the liver between the right 
and middle divisions of the coronary liga- 
ment; (6) the corresponding part of the 
diaphragm, and the right part of the night 
erus of the same; (7) part of the anterior 
surface of the terminal part of the great 
colon, and the origin of the small colon; 
(8) the left extremity of the pancreas (in- 
constant); (9) the spleen. 
Diaphragin 
We may now trace the perito- 
neum in a longitudinal direction, be- 
ginning infront. Itis reflected from Fic. 378 —Dracram or ABpoMINAL PERITONEUM IN FRONTAL 
the ventral abdominal wall and the MSIE ERIE Sv) ES GR 
‘diaphragm upon the liver, forming, 7, Dvetamm: 1 fldorm teament 2 less omen: 
the ligaments and serous coat of the omentum; 6, mesoduodenum; 7, general peritoneal cavity. 
gland. It leaves the visceral surface Atrow indicates epiploic foramen. By an oversight the pan- 
Paoiiver as lesser omentum, and creas, in front of the colon, is not marked. 
the crura of the diaphragm as the 
gastrophrenic ligament, reaches the saccus czecus and lesser curvature of the stomach 
and the first curve of the duodenum, covers these organs, and is continued by the 
greater omentum. 
On the left it passes from the left crus of the diaphragm and the left kidney to 
form the suspensory ligament of the spleen, clothes that organ, and leaves it to be 
continued by the greater and gastro-splenic omenta. 
On the right it passes from the right crus of the diaphragm and the dorsal 
border of the liver to the concave border of the duodenum, forming the gastro- 
pancreatic fold (second part of the mesoduodenum), and covering part of the dorsal 
surface of the pancreas. From the margin of the pancreas, the right kidney, and 
a small area of the sublumbar region behind the latter, it passes on to the base of 
_ 1 In dissecting-room subjects (which are usually aged) the omentum often exhibits patho- 
logical changes, such as adhesions, rents, tumors, formation of twisted strands, ete. 
unemiiail 
