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Diagram of the abdominal part of the alimentary canal (digestive system). Labels: C, the cardiac, and P, the pyloric end of the stomach; D, the duodenum; J, I, the convolutions of the small intestine; CC, the caecum with the vermiform appendix; AC, ascending, TC, transverse, and DC, descending colon; R, the rectum.

Alimentary Canal

Diagram of the abdominal part of the alimentary canal (digestive system). Labels: C, the cardiac, and…

Diagram of the abdominal part of the alimentary canal. Labels: C, the cardiac, and P, the pyloric end of the stomach, A; D, the duodenum; J, I, the convolutions of the small intestine; CC, the caecum with the vermiform appendix; AC, ascending, TC, transverse, and DC, descending colon; SF, sigmoid flexure; R, the rectum.

Alimentary Canal

Diagram of the abdominal part of the alimentary canal. Labels: C, the cardiac, and P, the pyloric end…

Portions of liver, duodenum, and pancreas, showing biliary and pancreatic ducts, head of pancreas turned back.

Biliary Apparatus

Portions of liver, duodenum, and pancreas, showing biliary and pancreatic ducts, head of pancreas turned…

Intestinal tract of <em>Canis vulpes</em>. S, cut end of duodenum; C, caecum; R, cut end of rectum.

Intestinal Tract from Canis Vulpes

Intestinal tract of Canis vulpes. S, cut end of duodenum; C, caecum; R, cut end of rectum.

cc. Colic caeca, d. Duodenum. g. Glandular patch, l.l. Meckel's tract, l.i. Hind-gut, p.v. Cut root of portal vein, r.v. Rectal vein, s. Proventriculus, y. Meckel's diverticulum.

Intestinal Tract of Chauna Chavaria

cc. Colic caeca, d. Duodenum. g. Glandular patch, l.l. Meckel's tract, l.i. Hind-gut, p.v. Cut root…

The stomach, pancreas, liver, and duodenum, with part of the rest of the small intestine and the mesentery; the stomach and liver have been turned up so as to expose the pancreas. Labels: V, stomach; D, D', D', duodenum; L, spleen P, pancreas; R, right kidney; T, jejunum; Vf, gallbladder; h, hepatic duct; c, cystic duct; ch, common bile-duct; 1, aorta, 2, an artery (left coronary) of the stomach; 3, hepatic artery; splenic artery; , superior mesenteric artery; 6, superior mesenteric vein; 7, splenic vein; Vp, portal vein.

Digestive Organs

The stomach, pancreas, liver, and duodenum, with part of the rest of the small intestine and the mesentery;…

Superior and inferior duodenal fossae.

Duodenal Fossae

Superior and inferior duodenal fossae.

The duodenal fossae and folds. The transverse colon and mesocolon have been thrown up, and the mesentery has been turned to the right and cut. The paraduodenal fossa is situated to the inner side of the inferior mesenteric vein, between it and the terminal part of the duodenum. It is not shown in the illustration.

Duodenal Fossae and Folds

The duodenal fossae and folds. The transverse colon and mesocolon have been thrown up, and the mesentery…

The blood vessels of the duodenum.

Blood Vessels of the Duodenum

The blood vessels of the duodenum.

The interior of the duodenum.

Interior of Duodenum

The interior of the duodenum.

Longitudinal section of duodenum; valvulae conniventes cut across, showing relation of these folds to villi.

Longitudinal Section of Duodenum

Longitudinal section of duodenum; valvulae conniventes cut across, showing relation of these folds to…

A vertical section of the duodenum, highly magnified. Labels: 1, a fold-like villus; 2, epithelium, or cuticle; 3, orifices of intestinal glands; 5, orifices of duodenal glands; 4, 7, more highly magnified sections of the cells of the duodenal gland.

A Magnified Section of the Duodenum

A vertical section of the duodenum, highly magnified. Labels: 1, a fold-like villus; 2, epithelium,…

Suspensory muscle of the duodenum or muscle of Treitz.

Suspensory Muscle of the Duodenum

Suspensory muscle of the duodenum or muscle of Treitz.

S, cut end of duodenum; R, cut end of rectum; C, caecum; P.C.L., post-caecal loop; S.P., spiral loop; SF, third loop of hind-gut.

Intestinal Tract of Giraffe

S, cut end of duodenum; R, cut end of rectum; C, caecum; P.C.L., post-caecal loop; S.P., spiral loop;…

S, cut end of duodenum; R, cut end of rectum; C, vermiform appendix of caecum; X1, X2, X3, cut ends of factors of the portal vein.

Intestinal Tract of a Gorilla

S, cut end of duodenum; R, cut end of rectum; C, vermiform appendix of caecum; X1, X2, X3, cut ends…

The intestine where digestion and nutrients are absorbed by blood.

Small Intestine

The intestine where digestion and nutrients are absorbed by blood.

Diagram to show the structure of the small and large intestine and duodenum.

Structure of the Intestine

Diagram to show the structure of the small and large intestine and duodenum.

Transverse section of small intestine (lower part of duodenum), showing general arrangement of coats.

Transverse Section of Small Intestine

Transverse section of small intestine (lower part of duodenum), showing general arrangement of coats.

S, cut end of duodenum; R, cut end of rectum; C, caecum; C2, accessory caecum; C.L., colic loop of hind-gut.

Intestinal Tract of Macropus Bennetti

S, cut end of duodenum; R, cut end of rectum; C, caecum; C2, accessory caecum; C.L., colic loop of hind-gut.

"The pancreas, partly cut away, so as to show the duct, which collects the pancreatic juice, and empties it into the duodenum." &mdash; Tracy, 1888

Pancreas

"The pancreas, partly cut away, so as to show the duct, which collects the pancreatic juice, and empties…

Posterior view of pancreas. Labels: 1, pancreas; 2, pancreatic duct; 6, opening of common duct, formed by union of pancreatic and choledochus ducts, into duodenum; A, pyloric end of stomach; B, duodenum; C, part of gall-bladder; D, cystic duct; E, hepatic duct; F, choledochus duct.

Posterior View of Pancreas

Posterior view of pancreas. Labels: 1, pancreas; 2, pancreatic duct; 6, opening of common duct, formed…

The pancreas and duodenum from behind.

Pancreas and Duodenum

The pancreas and duodenum from behind.

The pancreas and duodenum from behind, with the pancreatic duct exposed. The superior mesenteric vessels are also shown in section, passing forward, surrounded by the recurved portion of the head of the pancreas.

Pancreas and Duodenum from Behind

The pancreas and duodenum from behind, with the pancreatic duct exposed. The superior mesenteric vessels…

Showing the variations in the manner of termination of the pancreatic and bile ducts. A, Form in which the common bile duct (C, B, D) and main pancreatic duct (B) end in an ampulla (E). A, Accessory duct; i, ii., iii., first, second, and third stages of the duodenum. B, Form in which the ampulla is partly divided. The accessory duct is shown in its reduced form. C, Form in which he common bile-duct and pancreatic duct become separate openings into the duodenum. The accessory is absent.

Variations in Termination of the Pancreatic and Bile Ducts

Showing the variations in the manner of termination of the pancreatic and bile ducts. A, Form in which…

The bile papilla in the interior of the duodenum.

Bile Papilla of the Duodenum

The bile papilla in the interior of the duodenum.

Diagram of the peritoneum, a serous membrane covering all the contents of the abdominal cavity. Labels: D, diaphragm; L, liver; S, stomach; C, transverse colon; D, transverse duodenum; P, pancreas; I, small intestines; R, rectum; B, bladder.

The Peritoneum

Diagram of the peritoneum, a serous membrane covering all the contents of the abdominal cavity. Labels:…

Vertical and longitudinal section of stomach, gall-bladder, and duodenum. Labels: 1, esophagus; 2, cardiac orifice of stomach; 5, lesser curvature; , greater curvature; 8, rugae in interior of stomach; 9, pyloric orifice; 10, 11, 13, interior of duodenum, showing valvulae conniventes; 12, duct conveying bile, and P, duct conveying pancreatic juice, into the duodenum; 14, gall-bladder; 15, commencement of jejunum.

Vertical and Longitudinal Section of Stomach, Gall-Bladder, and Duodenum

Vertical and longitudinal section of stomach, gall-bladder, and duodenum. Labels: 1, esophagus; 2, cardiac…

The stomach, pancreas, liver, and duodenum, with part of the rest of the small intestine and the mesentery; the stomach and liver have been turned up so as to expose the pancreas. Labels: V, stomach; D, D',D'', duodenum; L, spleen; P, pancreas; R, right kidney; T, jejunum; Vf, gall bladder; h, hepatic duct; c, cystic duct; ch, common bile duct; 1, aorta; 2, an artery (left coronary) of the stomach; 3, hepatic artery; 4, splenic artery; 5, superior mesenteric artery; 6, superior mesenteric vein; 7, splenic vein; Vp, portal vein.

The Stomach, Pancreas, Liver, and Duodenum

The stomach, pancreas, liver, and duodenum, with part of the rest of the small intestine and the mesentery;…

Views of the stomach. Labels: A. stomach (human). B. Same, anterior wall removed. C. Portion of stomach, pylorus and duodenum. D. Section through coats of stomach. E. Fundus of a cardiac gland. F. Epithelium from surface of stomach. G. Arterie sand veins of mucous membrane. w. Esophagus. 2. Duodenum. 3. Pylorus. $. Cardia. 5. Lesser curvature. 6. Greater curvature. 7. Anterior surface. 8. Pyloric valve. 9. Mucous membrane, with rugae. 10. Inner surface of gastric mucous membrane. 11. Mucous membrane of duodenum with villi. 12. Pyloric gastric glands. 13. Circular or deep muscular fibers. 17. Mucous membrane. 18. Muscularis mucosae. 19. Submucous coat. 20. Circular muscular layer. 21. Longitudinal muscular layer. 22. Serous coat. 23. Orifice of gland. 24. Fundus of gland.

Views of the Stomach

Views of the stomach. Labels: A. stomach (human). B. Same, anterior wall removed. C. Portion of stomach,…

S. cut end of duodenum; R, cut end of rectum; C, caecum; Cl, colon.

Intestinal Tract of a Tapir

S. cut end of duodenum; R, cut end of rectum; C, caecum; Cl, colon.