A complete handbook for the sanitary troops of the U S army and navy . it makes a curve like the letter S, the sigmoid flexure,and ends in the rectum, which descends to the right and backwardto the anus. The intestines are covered with a smooth, shining membranewhich lines the abdomen and is known as the peritoneum; inflam-mation of this membrane is called peritonitis. The omentum is a sort of apron made of a fold of the peritoneum,containing much fat, which lies over the intestines and protects mesentery is the name applied to other of the peritoneum 66 ANATOMY AXD PHYSIOLOGY
A complete handbook for the sanitary troops of the U S army and navy . it makes a curve like the letter S, the sigmoid flexure,and ends in the rectum, which descends to the right and backwardto the anus. The intestines are covered with a smooth, shining membranewhich lines the abdomen and is known as the peritoneum; inflam-mation of this membrane is called peritonitis. The omentum is a sort of apron made of a fold of the peritoneum,containing much fat, which lies over the intestines and protects mesentery is the name applied to other of the peritoneum 66 ANATOMY AXD PHYSIOLOGY which bind the intestines loosely to the abdominal walls behindthem. In the abdominal walls are certain weak places where blood-vessels pass out of the cavity and the intestines have a tendency tofollow the vessels; these places are the nmhilicus or navel, tlie in-guinal civial, along which the vessels pass to the testicle, and tliefemoral canal, for those to the thigh. When the intestine does soescape we ha\e hernia, nnibilical, itujninal, or femoral, Fig. 30.— Pancreas in Section to Show Its Duct. In the upper })art of the abdomen, on the right side and extendingsomewhat to the left, we have the liver (Fig. 27 ) ; it is the largestgland in the body, weighing between four and four and a half pounds,and in its natural state lies almost wholly behind the ribs. Theliver has two large lobes, between which and projecting just beyondthe ribs is the gall bladder, which empties by a narrow duct into thesmall intestine just beyond the stomach. To the left of the stomach and al^o behind the ribs is anothergland, which has no duct, called the spleen; it is dark colored andabout the size and shape of the hand without the fingers. Deeply placed behind the stomach and extending transverselyacross the abdomen is a slender tongue-shaped gland, the panereasor sTi-eethread ( ). It is about six inches long by three-fourthsof an inch broad, cream colored, and has a duct whi
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