Human Digestive System | ClipArt ETC

This human anatomy ClipArt gallery offers 240 illustrations of the human digestive system. This includes views of the gastrointestinal tract and organs involved in the breakdown and absorption of food. Included in this category are the oral cavity, salivary glands, stomach, esophagus, intestines, colon, and gallbladder.

A Portion of the Mucous Membrane from the Small Intestine

Portion of the mucous membrane from the small intestine, magnified, showing the villi on its free surface,…

Diagram of mucous membrane in vertical section.

Mucous Membrane in Vertical Section

Diagram of mucous membrane in vertical section.

Free surface of the mucous membrane of the small intestine, showing villi, solitary glands, and opening of the intestinal glands.

Mucous Membrane of the Small Intestine

Free surface of the mucous membrane of the small intestine, showing villi, solitary glands, and opening…

The mucous membrane of the stomach. The top image is natural size and shows the rugae and he mamillated surfaces. The bottom image is magnified 25 times and shows the gland mouths, with the gland tubes leading from some of them, and the ridges separating the mouths are seen.

Mucous Membrane of the Stomach

The mucous membrane of the stomach. The top image is natural size and shows the rugae and he mamillated…

Gastropulmonary Mucous Membrane

Diagram of the gastropulmonary mucous membrane, showing the continuity of all its parts.

The mucous membrane of the stomach. A, Natural size. B. Magnified. In A the rugae and the mammilated surface are shown. In B the gland mouths, with gland tubes leading off from some of them, and the ridges separating the mouths are seen.

Stomach Mucous Membrane

The mucous membrane of the stomach. A, Natural size. B. Magnified. In A the rugae and the mammilated…

Modes of approach to the esophagus and the cervical sympathetic ganglion shown by means of a cross section of the neck at the level of the 7th cervical vertebra. A: Approach to esophagus internal to carotid sheath. B : An incision in midline beneath the hyoid bone to the esophagus. C: An approach similar to (A), median to the carotid sheath, and (D), external to the carotid sheath, to expose the cervical sympathetic ganglion and trunk and the inferior, thyroid artery.

Cross Section of Neck at the 7th Cervical Vertebra

Modes of approach to the esophagus and the cervical sympathetic ganglion shown by means of a cross section…

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…

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.

The upper illustrations show conical and fungiform papillae, the lower a circumvallate papilla. Labels: C, corium; E, epithelium of the mucous membrane. The wavy dark line represents arteries.

Papillae of the Tongue

The upper illustrations show conical and fungiform papillae, the lower a circumvallate papilla. Labels:…

Circumvallate papillae of the tongue.

Circumvallate Papillae

Circumvallate papillae of the tongue.

The epithelium covering the filiform papillae is extremely dense and thick, and projects from their sides and summits in the form of long, stiff, hair-like processes. Shown are two filiform papillae, one with epithelium, the other without. Labels: p, the substance of the papillae dividing at their upper extremities into secondary papillae; a, artery, and v, vein, dividing into capillary loops; e, epithelial covering, laminated between the papillae, but extended into hair-like processes, f, from the extremities of the secondary papillae.

Filiform Papillae

The epithelium covering the filiform papillae is extremely dense and thick, and projects from their…

Filiform papillae of the tongue.

Filiform Papillae

Filiform papillae of the tongue.

The fungiform papillae are scattered chiefly over the sides and tip, and sparingly over the middle of the dorsum, of the tongue; their name is derived from their being usually narrower at their base than at their summit. Shown in the surface section of the fungiform papillae. A, the surface of a fungiform papilla, partially denuded of its epithelium; p, secondary papillae; e, epithelium. B, section of a fungiform papilla with the blood vessels injected; a, artery; v, vein; c, capillary loops of similar papillae in the neighboring structure of the tongue; d, capillary loops of the secondary papillae; e, epithelium.

Fungiform Papillae

The fungiform papillae are scattered chiefly over the sides and tip, and sparingly over the middle of…

Fungiform papillae of the tongue.

Fungiform Papillae

Fungiform papillae of the tongue.

The parotid-one of salivary glands.

Parotid

The parotid-one of salivary glands.

The parotid gland (glandula parotis), the largest of the three salivary glands.

The Parotid Gland

The parotid gland (glandula parotis), the largest of the three salivary glands.

The peptic gastric glands are distributed throughout the entire fundus and body, and may be found even at the pylorus. They are mainly of the simple tubular variety, and are lined by simple epithelial cells resting upon a delicate basement membrane supported by the tunica propria. The duct of these gland is shorter than in other variety.

Peptic Gastric Gland

The peptic gastric glands are distributed throughout the entire fundus and body, and may be found even…

The pericecal folds and fossae are three pouches found in the area of the cecum.

Pericecal Fossae

The pericecal folds and fossae are three pouches found in the area of the cecum.

A Peyer's patch consists of a large number of lymphoid nodules grouped closely together so as to form a slightly elevated area, usually of an oblong form, on the surface of the mucous membrane. Peyer's patch and solitary glands, from intestine of child two years old. Near the lower border are seen a few small patches made up of two or three lymphatic nodules; they are marked "intermediate form."

Peyer's Patch

A Peyer's patch consists of a large number of lymphoid nodules grouped closely together so as to form…

The anterior surface of the pharynx.

Pharynx

The anterior surface of the pharynx.

The lower part of the pharynx and the upper part of the esophagus have been slit up from behind, and the mucous membrane removed to show the muscular fibers. The two longitudinal bands are seen coming round to the front to be attached by a common tendon to the upper border of the cricoid cartilage.

Pharynx and Esophagus

The lower part of the pharynx and the upper part of the esophagus have been slit up from behind, and…

The anterior all of the pharynx with its orifices, seen from behind.

Pharynx Wall

The anterior all of the pharynx with its orifices, seen from behind.

The Pharynx

The structure of the pharynx, a conical, musculo-membranous tube that forms the alimentary canal which…

Section showing the pyloric glands. Labels: s, free surface; d, ducts of pyloric glands; n, neck of same; m, the gland alveoli; mm, muscularis mucosae.

Pyloric Gland

Section showing the pyloric glands. Labels: s, free surface; d, ducts of pyloric glands; n, neck of…

The pyloric glands are the branched tubular glands, and secrete mucus and pepsin.

Pyloric Gland

The pyloric glands are the branched tubular glands, and secrete mucus and pepsin.

Diagram to show formation of pylorus. Labels: P, peritoneum; L, longitudinal layer of muscular fibers; C, circular layer; M, mucous membrane; V, villi. It will be seen that the pyloric narrowing is due practically entirely to a gradual thickening of the circular muscular fibers, which stops abruptly at the pyloric orifice.

Formation of Pylorus

Diagram to show formation of pylorus. Labels: P, peritoneum; L, longitudinal layer of muscular fibers;…

The interior of the anal canal and lower part of the rectum. Showing the column of Morgagni and the anal valves between their lower ends. The columns were more numerous in this specimen than usual.

Rectum and Anal Canal

The interior of the anal canal and lower part of the rectum. Showing the column of Morgagni and the…

The stages of the rectum and the anal canal on mesial section.

Rectum and Anal Cavity

The stages of the rectum and the anal canal on mesial section.

The blood vessels of the rectum and anus, showing the distribution and anastomosis on the posterior surface near the termination of the gut.

Blood Vessels of the Rectum and Anus

The blood vessels of the rectum and anus, showing the distribution and anastomosis on the posterior…

Inner wall of the lower end of the rectum and anus. On the right the mucous membrane has been removed to show the dilation of the veins and how they pass through the muscular wall to anastomose with the external hemorrhoidal plexus.

Inner Wall of the Rectum and Anus

Inner wall of the lower end of the rectum and anus. On the right the mucous membrane has been removed…

The retrocecal fossa. The ileum and cecum are drawn backward and upward.

Retrocecal Fossa

The retrocecal fossa. The ileum and cecum are drawn backward and upward.

The Salivary Gland with its duct.

Salivary Gland

The Salivary Gland with its duct.

"While the food is being chewed it is moistened by saliva, or spittle, which flows into the mouth from six little glands. They are known as salivary glands. There are three of them on each side." — Blaisedell, 1904

Salivary glands

"While the food is being chewed it is moistened by saliva, or spittle, which flows into the mouth from…

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the corners of the lower jaw; and the other pair is found in front of and below the ears." — Ritchie, 1918

Salivary glands

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the…

The salivary glands.

The Salivary Glands

The salivary glands.

The salivary glands. One side of the lower jaw has been removed, and the face dissected, in order to show the salivary glands on the right side.

Salivary Glands

The salivary glands. One side of the lower jaw has been removed, and the face dissected, in order to…

The salivary glands and their ducts.

Salivary Glands

The salivary glands and their ducts.

A portion of the small intestine opened to show the valvulae conniventes (folds).

Small Intestine

A portion of the small intestine opened to show the valvulae conniventes (folds).

Villi of the small intestine, magnified about 80 diameters. In the left-hand figure the lacteals, a,b,c, are filled with white injection; d, blood-vessels. In the right-hand figure the lacteals alone are represented, filled with a dark injection. The epithelium covering the villi, and their muscular fibers are omitted.

Small Intestine Villi

Villi of the small intestine, magnified about 80 diameters. In the left-hand figure the lacteals, a,b,c,…

"<em>A, B,</em> glands seen in vertical section with their orifices at <em>C</em> opening upon the membrane between the villi; <em>D</em>, villus." — Blaisedell, 1904

Glands and villi of the small intestine

"A, B, glands seen in vertical section with their orifices at C opening upon the membrane…

"Piece of small intestine cut open to show wrinkling of inner coat bearing villi." —Davison, 1910

Piece of small intestine

"Piece of small intestine cut open to show wrinkling of inner coat bearing villi." —Davison, 1910

The small intestine, a convoluted, tubular, digestive organ, about 20 ft in length, extending from the pylorus to the ileo-caecal valve, where it terminates in the large intestine. It is connect to the spinal column by the mesenteric portion of the peritoneum, and divided into 3 parts, the duodenum (d), the jejunum, and the ileum (i).

The Small Intestine

The small intestine, a convoluted, tubular, digestive organ, about 20 ft in length, extending from the…

"In the figure on the left are seen the artery and vein of a villus. In the right figure are represented the central lacteal of the villus, with the plexus of lymph vessels at the base. The mucous, submucuous, muscular, and serous coats are indicated at the base of the right-hand figure. The epithelium of each villus is well shown." — Blaisedell, 1904

Transverse section of the small intestine

"In the figure on the left are seen the artery and vein of a villus. In the right figure are represented…

The spleen.

Spleen

The spleen.

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

Spleen, Liver, and Kidneys

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

Section of the spleen showing termination of blood vessels.

Section of the Spleen

Section of the spleen showing termination of blood vessels.

The spleen, a soft, brittle, highly vascular organ, of dark purplish color, in size about 5 x 3 x 1.5 inches, about 7 ounces, situated deeply in the left hypochondrium, between the fundus of the stomach in front and internally, and the diaphragm behind and externally. It is connected with the stomach, diaphragm, and the left kidney through folds of the peritoneum.

The Spleen

The spleen, a soft, brittle, highly vascular organ, of dark purplish color, in size about 5 x 3 x 1.5…

The spleen.

Transverse Section of the Spleen

The spleen.

"<em>A</em>, cardiac end; <em>B</em>, pyloric end." — Blaisedell, 1904

Stomach

"A, cardiac end; B, pyloric end." — Blaisedell, 1904

"The stomach is a half-gallon sac, with an outer wall of muscle lined within by mucous membrane, made largely of gastric glands of which there are more than a million. These glands, each consisting of a tube with several branches, give out daily three quarts of gastric juice to dissolve the lean meat and other like foods." —Davison, 1910

Stomach

"The stomach is a half-gallon sac, with an outer wall of muscle lined within by mucous membrane, made…

The stomach and intestines. 1: Stomach. 2: Duodenum. 3: Small intestine. 4: Termination of the ileum. 5: Coecum. 6: Vermiform appendix. 7: Ascending colon. 8: Transverse colon. 9: Descending colon. 10: Sigmoid flexure of the colon. 11: Rectum. 12: Spleen.

Stomach

The stomach and intestines. 1: Stomach. 2: Duodenum. 3: Small intestine. 4: Termination of the ileum.…

Section of the Stomach. 1: Cardiac orifice; 2: Folds of mucous membrane; 3: Muscular wall; 4: Pylorus; 5: Gall-bladder; 6: Duodenum; 7: Folds of mucous membrane; 8: Entrance of bile and pancreatic juice.

Stomach

Section of the Stomach. 1: Cardiac orifice; 2: Folds of mucous membrane; 3: Muscular wall; 4: Pylorus;…

The stomach. Labels: d, lower end of the gullet; a, position of the cardiac aperture; b, the fundus; c, the pylorus; e, the first part of the small intestine; along a,b,c, the great curvature; between the pylorus and d, the lesser curvature.

The Stomach

The stomach. Labels: d, lower end of the gullet; a, position of the cardiac aperture; b, the fundus;…

The human stomach. Labels: a, the esophagus or gullet; b, the cardiac portion; c, the left extremity; d, the small extremity; e, the pylorus tied; g,g, the omentum or caul, which is attached to the outside of the stomach, and falls over the intestines like a curtain.

Stomach

The human stomach. Labels: a, the esophagus or gullet; b, the cardiac portion; c, the left extremity;…

The digestive system. This figure represents the whole tract of the intestinal canal, not exactly in its natural position, but spread out so as to show the relative proportions; f, the esophagus; g, cardia; h, pylorus; i, i, the duodenum, about twelve fingers; breadth in length; k, hepatic duct; l, gall bladder; m, cystic duct; n, ductus communis, formed by the union of both; o, the opening of this duct into the duodenum; p, pancreatic duct; q, its opening into the duodenum; r, jejunum; s, ilium; these constitute the small intestines, and are about 26 feet in length, or five times the length of the body; t, termination of ilium in the coecum; , u, superior fold of valve of colon; v, inferior do. ; w, coecum; x, vermiform process; y, y, colon; z, rectum. The coecum, colon, and rectum, form the large intestines, and are about 6 feet in length; the coecum being about 4 inches long, and the same in diameter. The arrows show the direction which the food takes in digestion.

Stomach

The digestive system. This figure represents the whole tract of the intestinal canal, not exactly in…

The stomach showing the muscles which churn the food. Labels: E, where food enters; V, entrance into the intestine, D.

Stomach

The stomach showing the muscles which churn the food. Labels: E, where food enters; V, entrance into…

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