Horizontal section through upper part of abdomen. Labels: a, liver; b, stomach; c, transverse colon; d, spleen; e, kidneys; f, pancreas; g, inferior vena cava; h, aorta with thoracic duct behind it.

Horizontal Section Through Abdomen

Horizontal section through upper part of abdomen. Labels: a, liver; b, stomach; c, transverse colon;…

Diagrammatic transverse section of abdomen, to show the peritoneum on transverse tracing. A, at level of foramen of Winslow. B, lower down. In A note, one of the vasa brevia arteris passing to the stomach between the layers of the gastrosplenic omentum, and also the foramen of Winslow leading into the lesser sac which lies behind the stomach.

Transverse Section of Abdomen

Diagrammatic transverse section of abdomen, to show the peritoneum on transverse tracing. A, at level…

Regions of the abdomen and their contents (edge of costal cartilages in dotted outline)."For convenience of description the abdomen may be artificially divided into nine regions by drawing two circular lines around the body parallel with the cartilages of the ninth ribs, and the highest point of the crests of the ilia; and two vertical lines from the cartilage of the eighth rib on each side to the center of Poupart's ligament. The vicar contained in these different regions are as follows: -- Right Hypochondriac - the right lobe of the liver and gall-bladder, hepatic flexure of the colon, and part of the right kidney. Right Lumbar - ascending colon, part of the right kidney, and some convolutions of the small intestines. Right Inguinal (Iliac) - the caecum, appendix caeci. Epigastric Region - the middle and pyloric end o the stomach, left lobe of the liver, the pancreas, the duodenum, part of the kidneys and the suprarenal capsules. Umbilical Region - the transverse colon, part of the great omentum and mesentery, transverse part of the duodenum, and some convolutions of the jejunum and ileum, and part of both kidneys. Hypogastric Region - convolutions of the small intestines, the bladder in children, and in adults if distended, and the uterus during pregnancy. Left Hypochondriac - the splenic end of the stomach, the spleen and extremity of the pancreas, the splenic flexure of the colon, and part of the left kidney. Left Lumbar - descending color, part of the omentum, part of the left kidney, and some convolutions of the small intestines. Left Inguinal (Iliac) - sigmoid flexure of the colon." — Kimber, 1907.

Regions of the Abdomen and their Contents

Regions of the abdomen and their contents (edge of costal cartilages in dotted outline). "For convenience…

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…

"<em>A</em>, a portion of the colon laid open to show the valve between the large and small intestine; <em>B</em>, the caecum." &mdash; Blaisedell, 1904

Vermiform appendix

"A, a portion of the colon laid open to show the valve between the large and small intestine;…

"The spinal column below the twelfth dorsal vertebra at <em>A</em> has been removed, as well as the various layers of the great muscles of the back. The two kidneys with the renal arteries and veins are plainly shown, in their normal positions. The relative positions of adjacent vessels and organs with their names printed upon them are also shown. <em>B</em>, portion of the diaphragm on the left side; <em>C</em>, receptaculum chyli; <em>D</em>, a part of the small intestine on the left side." &mdash; Blaisedell, 1904

Vertical section of the back

"The spinal column below the twelfth dorsal vertebra at A has been removed, as well as the…

View looking into the male pelvis from above and somewhat behind. From a specimen in which the bladder was firmly contracted and contained but a small amount of fluid. The paravesical fossa is seen on each side of the bladder. The deep peritoneal pouch in front of the rectum is bounded by marked crescentic folds, which meet together some distance behind the posterior border of the bladder.

View of Male Pelvis Showing Bladder

View looking into the male pelvis from above and somewhat behind. From a specimen in which the bladder…

Caecum and colon of a dog-inflated. Labels: a, ileum; b, caecum; c, colon.

Caecum and Colon of a Dog

Caecum and colon of a dog-inflated. Labels: a, ileum; b, caecum; c, colon.

Caecum and colon of a hog-inflated. Labels: a, ileum; b, caecum; c, colon; d, rectum.

Caecum and Colon of a Hog

Caecum and colon of a hog-inflated. Labels: a, ileum; b, caecum; c, colon; d, rectum.

Caecum and great colon of a horse. Labels: a, caecum; b, c, its muscular bands; d, termination of the ileum; e, first; e', second; f, third; f', fourth division of colon; g, pelvic flexure; h, origin of floating colon. The arrows indicate the course of the food through the colon.

Caecum and Colon of Horse

Caecum and great colon of a horse. Labels: a, caecum; b, c, its muscular bands; d, termination of the…

Caecum and origin of colon of an ox- inflated. Labels: a, terminal portion of the ileum; b, caecum; c, origin of colon.

Caecum of an Ox

Caecum and origin of colon of an ox- inflated. Labels: a, terminal portion of the ileum; b, caecum;…

Arteries and veins of the cecum and vermiform appendix seen from behind.

Arteries and Veins of the Cecum and Appendix

Arteries and veins of the cecum and vermiform appendix seen from behind.

The cecum and colon laid open to show the ileocecal valve.

Cecum Showing Ileocecal Valve

The cecum and colon laid open to show the ileocecal valve.

The relation of anterior abdominal digestive organs- left antero-lateral view. Labels: 1, liver; 2, stomach; 3, spleen; 4, colon; a, gastro-hepatic omentum; b, gastro-splenic omentum; c, great omentum; c', its free portion.

Digestive Organs of a Horse

The relation of anterior abdominal digestive organs- left antero-lateral view. Labels: 1, liver; 2,…

The digestive system of a katydid.

Digestive System

The digestive system of a katydid.

The digestive system of a grasshopper.

Digestive System

The digestive system of a grasshopper.

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 ileo-caecal valve, where the small intestine joins the large. Labels: a, ileum; b, ascending colon; c, caecum; d, junction of the caecum and colon; e and f, loose folds of the mucous membrane, forming the ileo-caecal valve; g, vermiform appendage.

Ileo-caecal valve

The ileo-caecal valve, where the small intestine joins the large. Labels: a, ileum; b, ascending colon;…

Large intestine, A piece of transverse colon from a child two years old. The three chief characteristics of the large intestine- sacculations, taeniae, and appendices epiploicae- are shown.

Large Intestine

Large intestine, A piece of transverse colon from a child two years old. The three chief characteristics…

Segment of large intestine showing the characteristic feature of its structure.

Structure of Large Intestine

Segment of large intestine showing the characteristic feature of its structure.

Two diagrams to illustrate the development of the mesenteries. In the first figure the rotation of the intestinal loop and the continuous primitive mesentery is shown. In the second figure (to the right), which shows a more advances stage, the portions of the primitive mesentery (going to the ascending and descending colons) which disappear through their adhesion to the posterior abdominal wall, are shaded dark, the portions which persist are lightly shaded.

Development of the Mesenteries

Two diagrams to illustrate the development of the mesenteries. In the first figure the rotation of the…

Diagram to illustrate the development of the great omentum. A, shows the beginning of the great omentum and its independence of the transverse mesocolon; in B, the two come in contact; and in C, they have fused along the line of contact. Labels: A, stomach; B, transverse colon; C, small intestine; D, duodenum; E, pancreas; F, great omentum; G, placed in great sac; H, in small sac of peritoneum.

Development of the Great Omentum

Diagram to illustrate the development of the great omentum. A, shows the beginning of the great omentum…

A street in Cristóbal, Colón in Panama. Cristóbal is a port in the Atlantic side of the Panama Canal.

Colón, Cristóbal in Panama

A street in Cristóbal, Colón in Panama. Cristóbal is a port in the Atlantic side of the Panama Canal.

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:…

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.

Diagram of the relations of the large intestine and kidneys, from behind.

Trunk Showing Organs of Digestion

Diagram of the relations of the large intestine and kidneys, from behind.