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The abdomen viscera after the removal of the jejunum and ileum. The transverse colon is much more regular than usual. Both the liver and caecum extend lower down than normal. The subdivisions of the abdominal cavity are indicated by dark lines.

Abdomen Laid Open After Removal of Jejunum and Ileum

The abdomen viscera after the removal of the jejunum and ileum. The transverse colon is much more regular…

The abdominal and thoracic viscera of a five months fetus. The large liver and large size if its left lobe at this age should be noted.

Abdomen of Fetus

The abdominal and thoracic viscera of a five months fetus. The large liver and large size if its left…

Abdomen of female showing displacement resulting from tight lacing. The liver is much enlarged, and extends on the left side to the ribs, where it was folded back on itself for over an inch. The pyloric end of the stomach and the beginning of the duodenum are quite superficial below the liver, and all the viscera are displaced downwards.

Abdomen Showing Displacement Caused by Corset

Abdomen of female showing displacement resulting from tight lacing. The liver is much enlarged, and…

Schematic outlines of the abdomen.

Abdomen Types of a Male, Infant, and Female

Schematic outlines of the abdomen.

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;…

"The principal muscles are seen on the left, and superficial veins on the right." — Blaisedell, 1904

Principal Organs of the Thorax and Abdomen

"The principal muscles are seen on the left, and superficial veins on the right." — Blaisedell, 1904

Regions of the abdomen. The abdomen is divided into 9 regions by two horizontal planes, one at the level of the cartilages of the 10th ribs (sub-costal plane), another at the level of the highest poitns of the crests of the ilia, and 2 vertical or lateral planes from the cartilages of the 8th ribs to the center of Poupart's inguinal ligament.

Regions of the Abdomen

Regions of the abdomen. The abdomen is divided into 9 regions by two horizontal planes, one at the level…

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…

"Pertaining to the abdomen or belly; situated in or on the abdomen: as <em>abdominal<em> ventral fins."-Wright, 1902

Abdominal

"Pertaining to the abdomen or belly; situated in or on the abdomen: as abdominal ventral fins."-Wright,

"In human anatomy, certain regions into which the abdomen is arbitrarily divided for the purpose of mapping its surface with reference to the viscera which lie beneath these reions respectively."-Wright, 1902

Abdominal

"In human anatomy, certain regions into which the abdomen is arbitrarily divided for the purpose of…

Abdominal organs. Labels: 1, liver turned up; 2, gall bladder; 3, stomach; 4, large intestine; 5, small intestine.

Abdominal Organs

Abdominal organs. Labels: 1, liver turned up; 2, gall bladder; 3, stomach; 4, large intestine; 5, small…

Abdominal organs. Labels: 1, liver turned up; 2, gall bladder; 3, right kidney; 4, spleen; 5, left kidney.

Abdominal Organs

Abdominal organs. Labels: 1, liver turned up; 2, gall bladder; 3, right kidney; 4, spleen; 5, left kidney.

Abdominal organs. Labels: 1, liver; 2, gall bladder; 3, spleen; 4, pancreas.

Abdominal Organs

Abdominal organs. Labels: 1, liver; 2, gall bladder; 3, spleen; 4, pancreas.

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." &mdash; 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…

View of the posterior abdominal wall to show the muscles and the nerves of the lumbo sacral plexus.

Muscles of the Abdominal Wall

View of the posterior abdominal wall to show the muscles and the nerves of the lumbo sacral plexus.

The abdomen of the honey-bee.

Honey Bee

The abdomen of the honey-bee.

The abdomen of the May beetle.

May Beetle

The abdomen of the May beetle.

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae dwell at the bottom of ponds.

Water Beetle Larva

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae…

"Readily distinguished from the other groups of beetles by having the elytra much shorter then the abdomen, although they still suffice to cover the long membranous wings, which when not in use are completely folded beneah. The abdomen is long and exceedingly mobile, and is employed in folding and unfolding the wings. It is furnished at its extremity with two vesicles which can be protruded or withdrawn at pleasure, and from which, when irritated, many species emit a most disagreeable odor, although in a few the scent is more pleasing. They are voracious both in the larval and perfect states, feeding chiefly upon decaying animal and vegetable matters, although a few species devour living prey. Many of the smaller forms reside in and feed on mushrooms, some are found abundantly under putrescent plants, others in manure heaps, where they feed upon the maggots of flies, while there are a few forms which make their homes in the nests of the hornet and the ant." &mdash; Encyclopedia Britanica, 1893

Brachelytra

"Readily distinguished from the other groups of beetles by having the elytra much shorter then the abdomen,…

The abdomen of the monarch. This common butterfly is of a brown color, with black veins and wing borders.

Monarch Butterfly

The abdomen of the monarch. This common butterfly is of a brown color, with black veins and wing borders.

Flat cells from the surface of the lining membrane of the abdomen (peritoneum). Labels: a, cell-body; b, nucleus; c, nucleoli.

Cells from the Abdominal Lining

Flat cells from the surface of the lining membrane of the abdomen (peritoneum). Labels: a, cell-body;…

The female chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

Female Chalcid Wasp

The female chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

The male chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

Male Chalcid Wasp

The male chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

A front view of the chest and abdomen in respiration. Labels: 1, The position of the walls of the chest in inspiration. 2, The position of the diaphragm in inspiration. 3, The position of the walls of the chest in expiration. 4, The position of the diaphragm in expiration. 5, The position of the walls of the abdomen in inspiration. 6, The position of the abdominal walls in expiration.

A Front View of the Chest and Abdomen in Respiration

A front view of the chest and abdomen in respiration. Labels: 1, The position of the walls of the chest…

A side view of the chest and abdomen in respiration. Labels: 1, The cavity of the chest. 2, The cavity of the abdomen. 3, The line of direction for the diaphragm when relaxed in expiration. 4, The line of direction for the diaphragm when contracted in inspiration. 5, 6, The position of the front walls of the chest and abdomen in inspiration. 7, 8, The position of the front walls of the abdomen and chest in expiration.

A Side View of the Chest and Abdomen in Respiration

A side view of the chest and abdomen in respiration. Labels: 1, The cavity of the chest. 2, The cavity…

View of the diaphragm; 1, cavity of the thorax; 2, diaphragm separating the cavity of the thorax from that of the abdomen; 3, cavity of the pelvis.

Diaphragm

View of the diaphragm; 1, cavity of the thorax; 2, diaphragm separating the cavity of the thorax from…

A diagram of the organs of digestion. Labels:1, The upper jaw. 2, The lower jaw. 3, The tongue. 4, The roof of the mouth. 5, The esophagus. 6, The trachea. 7, The parotid gland. 8, The sublingual gland. 9, The stomach. 10, The liver. 11, The gall cyst. 12, The duct that conveys the bile to the duodenum (13). 14, The pancreas. 15, The small intestine. 16, The opening of the small intestine into the large intestine. 17, 18, 19, 20, The large intestine. 21, The spleen. 22, The upper part of the spinal column.

Digestive System

A diagram of the organs of digestion. Labels:1, The upper jaw. 2, The lower jaw. 3, The tongue. 4, The…

External features of a grasshopper abdomen.

Grasshopper

External features of a grasshopper abdomen.

External features of a grasshopper metathorax.

Grasshopper

External features of a grasshopper metathorax.

External features of a grasshopper mesothorax.

Grasshopper

External features of a grasshopper mesothorax.

External features of a grasshopper prothorax.

Grasshopper

External features of a grasshopper prothorax.

"Anatomy of the external skeleton of an insect" &mdash; Goodrich, 1859

External Anatomy of an Insect Skeleton

"Anatomy of the external skeleton of an insect" — Goodrich, 1859

The peritoneum is a large serous membrane, which forms in the male a closed sac, the parietal layer of which lines the abdominal walls, its visceral layer being reflected more or less completely over all the abdominal and pelvic viscera. It's free surface is covered with endothelium, and is smooth, moist, and shining. Its attached surface is connected to the viscera and the parietes of the abdomen by the sub-peritoneal tela or areolar tissue. In the female it is not a closed sac, the free extremities of the Fallopian tubes opening directly into the cavity. The peritoneum is divided by a constricted portion of its tissue, at the foramen of Winslow into 2 sacs, the Greater Sac and the Lesser Sac.

The Peritoneum

The peritoneum is a large serous membrane, which forms in the male a closed sac, the parietal layer…

Dissection of the spleen, liver, and kidneys from behind.

Spleen, Liver, and Kidneys

Dissection of the spleen, liver, and kidneys from behind.

A diagram of the thoracic and abdominal regions. Labels: A, aortic valve; M, mitral valve; p, pulmonary valve; tricuspid valve.

Diagram of Thoracic and Abdominal Regions

A diagram of the thoracic and abdominal regions. Labels: A, aortic valve; M, mitral valve; p, pulmonary…

The human thoracic viscera.

Thoracic Viscera

The human thoracic viscera.

"Thorax and abdomen. 1, 1, 1, 1. Muscles of the chest. 2, 2, 2, 2. Ribs. 3, 3, 3. Upper, middle and lower lobes of the right lung. 4, 4. Lobes of the left lung. 5, Right ventricle of the heart. 6. Left ventricle. 7. Right auricle. 8. Left auricle. 9. Pulmonary artery. 10. Aorta. 11. Descending vena cava. 12. Trachea. 13. Oesophagus. 14, 14, 14, 14. Pleura. 15, 15. Diaphragm. 16, 16. Right and left lobes of the liver. 17. Gall cyst. 18. Stomach. 19. Duodenum. 20. Ascending colon. 21. Transverse colon. 22. Descending colon. 23, 23. Small intestine. 24. Thoracic duct opening into the left subclavian vein. 25. Spleen." -Foster, 1921

Thorax and Abdomen

"Thorax and abdomen. 1, 1, 1, 1. Muscles of the chest. 2, 2, 2, 2. Ribs. 3, 3, 3. Upper, middle and…

Lateral, sagittal section through the left thorax and upper portion of abdomen, viewed from the left. The plane of the section lies 4 cm to the left of the median plane.

Side View of the Thorax and Part of the Abdomen

Lateral, sagittal section through the left thorax and upper portion of abdomen, viewed from the left.…

Diagram of horizontal section through upper part of 1st lumbar vertebra. The fine dots represent the great sac of the peritoneum, the coarse dots the lesser sac. Labels: A, aorta; Sp, spleen; B.D, bile duct; V.C, vena cava; P, pancreas; H.A, hepatic artery; K, kidney; L, liver; St, stomach; P.V, portal vein.

Horizontal Section Through Trunk

Diagram of horizontal section through upper part of 1st lumbar vertebra. The fine dots represent the…

Sagittal section through the trunk, 6 cm to the right of the median plane, viewed from the right. Note the close proximity of the duodenum and colon to the right kidney.

Side View of the Trunk

Sagittal section through the trunk, 6 cm to the right of the median plane, viewed from the right. Note…

Transverse section through the abdomen, opposite the second lumbar vertebra.

Transverse Section Through

Transverse section through the abdomen, opposite the second lumbar vertebra.

Diagram of vertical median section of abdomen. The fine dots represent the great sac of the peritoneum, the coarse dots the lesser sac. Labels: A, aorta; P, pancreas; I, intestine; R, rectum; L, liver; D, duodenum; B, bladder; St, stomach; c, colon; v, vagina.

Vertical Median Section of the Trunk

Diagram of vertical median section of abdomen. The fine dots represent the great sac of the peritoneum,…