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.

"The inner coat of the stomach has its surface honeycombed with millions of little pits. We have all seen this in tripe. In the floor of each of these tiny pits a number of tubes open. These are the openings of the <em>gastric glands</em>." — Blaisedell, 1904

Gastric gland

"The inner coat of the stomach has its surface honeycombed with millions of little pits. We have all…

Deeper portion of gastric glands from fundus, showing two varieties of lining cells and secretion capillaries connecting parietal with lumen.

Gastric Gland from Fundus

Deeper portion of gastric glands from fundus, showing two varieties of lining cells and secretion capillaries…

Gastric glands are often branched at the bottom end. Labels: a, the peptic cells; b, the inert cells.

Branched Gastric Gland

Gastric glands are often branched at the bottom end. Labels: a, the peptic cells; b, the inert cells.

A thin section through the gastric mucous membrane which lines the stomach, perpendicular to its surface, magnified about 25 diameters. a, a simple peptic gland; b, a compound peptic gland; c, a mucous gland.

Section through the Gastric Mucous Membrane

A thin section through the gastric mucous membrane which lines the stomach, perpendicular to its surface,…

"Diagram to show the working parts of a gland. v and a are blood tubes with thin-walled branches around the parts of the gland c. These take material from the blood and, after changing it, send it to the mouth, stomach, or other places before the duct i." —Davison, 1910

Gland

"Diagram to show the working parts of a gland. v and a are blood tubes with thin-walled branches around…

Gland of Lieberkuhn

The glands or crypts of Lieberkuhn are simple tubular depressions of the intestinal mucous membrane,…

Forms of glands. Labels: A, a simple secreting surface; a, its epithelium; b, basement membrane; c, capillaries; B, a simple tubular gland; C, a secreting surface increased by protrusions; E, a simple racemose gland; D and G, compound tubular glands; F, a compound racemose gland. In all but A, B, and C the capillaries are omitted for the sake of clearness. H, half of a highly developed racemose gland; c, its main duct.

Forms of Glands

Forms of glands. Labels: A, a simple secreting surface; a, its epithelium; b, basement membrane; c,…

Forms of glands. Labels: A, a simple secreting surface; a, its epithelium; b, basement membrane; c, capillaries; B, a simple tubular gland; C, a secreting surface increased by protrusions; E, a simple racemose gland; D and G, compound tubular glands; F, a compound racemose gland. In all but A, B, and C the capillaries are omitted for the sake of clearness. H, half of a highly developed racemose gland; c, its main duct.

Forms of Glands

Forms of glands. Labels: A, a simple secreting surface; a, its epithelium; b, basement membrane; c,…

Diagram showing various forms of secreting glands. Labels: 1, general plan of a secreating membrane; a, epithelial cells; b, basement membrane; c, connective tissue in which lie the blood-vessels (d); 2-7, simple and compound tubular and saccular glands; d, duct.

Diagram Showing Various Forms of Secreting Glands

Diagram showing various forms of secreting glands. Labels: 1, general plan of a secreating membrane;…

Sagittal section through mouth, tongue, larynx, pharynx, and nasal cavity. The section was slightly oblique, and the posterior edge of the nasal septum has been preserved. The specimen is viewed slightly from below, hence the apparently low position of the inferior turbinated bone.

Section of the Head and Neck

Sagittal section through mouth, tongue, larynx, pharynx, and nasal cavity. The section was slightly…

Section of the head through the hard palate

Cross Section of Head Through the Hard Palate

Section of the head through the hard palate

Section of the head through the oral cavity.

Cross Section of Head Through the Oral Cavity

Section of the head through the oral cavity.

Hepatic Cells in Deigestion

The hepatic cells at different stages of digestion.

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;…

Three forms of ileocaecal valve, from bodies hardened by intravascular injections of formalin.

Ileo-caecal Valve

Three forms of ileocaecal valve, from bodies hardened by intravascular injections of formalin.

Diagrammatic Section through the junction of the ileum with caecum, to show the formation of the ileocaecal valve.

Formation of Ileo-caecal Valve

Diagrammatic Section through the junction of the ileum with caecum, to show the formation of the ileocaecal…

The mucous membrane of the ileum. Labels: 1, cellular structure of the epithelium, or outer layer; 2, a vein; 3, fibrous layer; 4, villi covered with epithelium; 5, a villus partially uncovered; 7, a villus stripped of its epithelium; 8, lymphatics or lacteals; 9, orifices of the glands opening between the villi; 10, 11, 12, glands; 13, capillaries surrounding the orifices of the gland.

Mucous Membrane of the Ileum

The mucous membrane of the ileum. Labels: 1, cellular structure of the epithelium, or outer layer; 2,…

A, the natural position of the internal organs. B, when deformed by tight lacing. The liver and stomach have been forced downward almost as low as the pelvis.

The Natural Position Compared to the Deformed Position of the Internal Organs

A, the natural position of the internal organs. B, when deformed by tight lacing. The liver and stomach…

"<em>A</em>, a fold of peritoneum; <em>B</em>, lacteals and lymphatic glands; <em>C</em>, veins of intestines; <em>R.C.,</em>, receptacle of the chyle (receptaculum chyli); <em>P.V.</em>, portal vein; <em>H.V.</em>, hepatic veins; <em>S.V.C.</em>, superior vena cava; <em>R.A.</em>, right auricle of the heart; <em>I.V.C.</em>, inferior vena cava." — Blaisedell, 1904

Intestinal absorption

"A, a fold of peritoneum; B, lacteals and lymphatic glands; C, veins of intestines;…

Two diagrams to illustrate the development of the intestinal canal. The figure to the right shows the rotation of the intestinal loop round the superior mesenteric artery. In both figures the parts are supposed to be viewed from the left side.

Development of the Intestinal Canal

Two diagrams to illustrate the development of the intestinal canal. The figure to the right shows the…

Intestinal Villus

An intestinal villus. They are little projections of the mucous membrane, covered with epithelium, and…

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

Small Intestine Portion

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

"A tiny block cut from the wall of the intestine showing villi and the mouths of glands at a; b, villus cut open to show the lacteal e and blood tubes m for absorbing food." —Davison, 1910

Section of Intestine wall

"A tiny block cut from the wall of the intestine showing villi and the mouths of glands at a; b, villus…

A portion of the intestine, with mesentery and vessels. The peritoneal coat has been removed from the right half, and the two layers of the muscular coat exposed.

Small Intestine with Mesentery and Vessels

A portion of the intestine, with mesentery and vessels. The peritoneal coat has been removed from the…

Large Intestine

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

Large Intestine

A piece of transverse colon from a child two years old. The three chief characteristics of the large…

The intestine where digestion and nutrients are absorbed by blood.

Small Intestine

The intestine where digestion and nutrients are absorbed by blood.

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.

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.

Transverse section of the wall of the large intestine.

Transverse Section of the Wall of the Large Intestine

Transverse section of the wall of the large intestine.

Mucosa of small intestine in idea vertical cross section

Wall of Small Intestine

Mucosa of small intestine in idea vertical cross section

The Intestines. 1: Begining of Duodenum; 2: Small inestine; 3: Large intestine; 4: Rectum.

Intestines

The Intestines. 1: Begining of Duodenum; 2: Small inestine; 3: Large intestine; 4: Rectum.

View of the lower jaw bone with the tongue turned up.

Jaw Bone and Tongue

View of the lower jaw bone with the tongue turned up.

Showing the connection of the small intestine to the thoracic duct by the lacteals lying in the mesentery. Label: Th, thoracic duct.

Lacteals

Showing the connection of the small intestine to the thoracic duct by the lacteals lying in the mesentery.…

Lips

Lips

Lips

Lips

Lips

Lips

Lips

Lips

Lips

Lips

Lips

Lips

The large dlangular organ situated in the upper abdominal cavity of vertebrates, whose function is to secrete bile, elaborate and store up glycogen, and otherwise change the blood that passes through it.

Liver

The large dlangular organ situated in the upper abdominal cavity of vertebrates, whose function is to…

Section through the lymphoid tissue of a solitary gland. Labels: a, center of the gland, with the lymphoid tissue fallen away; b, epithelium of mucous membrane; c, c, villi, with epithelium partly broken away; d, crypts, or glands, of Lieberkuhn.

Lymphoid Tissue

Section through the lymphoid tissue of a solitary gland. Labels: a, center of the gland, with the lymphoid…

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…

"The mouth, nose and pharynx, with the commencement of the gullet and larynx, as exposed by a section, a little to the left of the median plane of the head. a, vertebral column; b, gullet; c, wind-pipe; d, larynx; e, epiglottis; f, soft palate; g, opning of eustachian tube; k, tongue; l, hard palate; m, the sphenoid bone on the base of the skull; n, the fore part of the cranial cavity; o, p, q, the turbinate bones of the outer side of the left nostril-chamber." —Martin, 1917

Mouth

"The mouth, nose and pharynx, with the commencement of the gullet and larynx, as exposed by a section,…

A mouth

Mouth

A mouth

The soft palate and tonsillar regions.

Mouth

The soft palate and tonsillar regions.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

A sketch of the human mouth and chin.

Mouth and Chin

A sketch of the human mouth and chin.

Horizontal section through mouth and pharynx at the level of the tonsils.

Horizontal Section Through Mouth and Pharynx

Horizontal section through mouth and pharynx at the level of the tonsils.

Open mouth with tongue raised, and the sublingual and apical glands exposed.

Mouth and Tongue

Open mouth with tongue raised, and the sublingual and apical glands exposed.

Section across anterior part of floor of mouth, showing relations of sublingual glands to mucous membrane and muscles.

Anterior Part of Floor of Mouth

Section across anterior part of floor of mouth, showing relations of sublingual glands to mucous membrane…

Antero-inferior surface of the soft palate. The tongue has been removed, so that the pharyngeal isthmus is distinctly seen.

Mouth, Cavity of the

Antero-inferior surface of the soft palate. The tongue has been removed, so that the pharyngeal isthmus…

Coronal section through the closed mouth. The slit liked character of the vestibule, the manner which the tongue fills up the mouth cavity, the close apposition of the teeth, the relations of the roots of the upper molars to the antrum of Highmore, the plica sublingualis over the sublingual gland, and the position of the ranine artery should be noted.

Section Through Mouth

Coronal section through the closed mouth. The slit liked character of the vestibule, the manner which…

Interior of the mouth. Labels: 1, soft palate; 2, its median ridge; 3, uvula; 4, anterior, 5, posterior pillar of fauces; 6, tonsil; 7, posterior wall of pharynx; 8, tongue.

The Mouth

Interior of the mouth. Labels: 1, soft palate; 2, its median ridge; 3, uvula; 4, anterior, 5, posterior…

Section of a mucous gland from the tongue. Labels: A, opening of the duct on the free surface; C, basement membrane with nuclei; B, flattened epithelial cells lining duct. The duct divides into several branches, which are convoluted and end blindly, being lined throughout by columnar epithelium. D, lumen of one of the tubuli of the gland.

Mucous Gland from Tongue

Section of a mucous gland from the tongue. Labels: A, opening of the duct on the free surface; C, basement…

The mucous membrane from the jejunum. Labels: 1, Villi (folds of lining mucous membrane) in miniature. 2, Tubular glands: their orifices. 3, Opening on the free surface of the mucous membrane. 4, Fibrous tissue.

Mucous Membrane from the Jejunum

The mucous membrane from the jejunum. Labels: 1, Villi (folds of lining mucous membrane) in miniature.…

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