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Skull of a baboon, showing the brain cavity.

Baboon skull

Skull of a baboon, showing the brain cavity.

"Organs in the body cavity viewed from the front." —Davison, 1910

Organs of the Body Cavity

"Organs in the body cavity viewed from the front." —Davison, 1910

"Vertical and Longitudinal section through skull of Castor Fiber, showing the cerebral cavity, the greatly-developed turbinal lamellae, the mode of implantation of the large over-growing chisel-edged incisor, and the curved rootless molars." —The Encyclopedia Britannica, 1903

Castor Fiber

"Vertical and Longitudinal section through skull of Castor Fiber, showing the cerebral cavity, the greatly-developed…

Head of a cuttlefish, showing the brain cavity.

Head of cuttlefish

Head of a cuttlefish, showing the brain cavity.

Skull of a deer, showing the brain cavity.

Deer skull

Skull of a deer, showing the brain cavity.

"Cast or mold of the interior of the left ventricle of the heart of a deer. Shows that the left ventricular cavity in conical and spiral in its nature."—Pettigrew, 1874

Heart of a Deer

"Cast or mold of the interior of the left ventricle of the heart of a deer. Shows that the left ventricular…

Any furnace in which the heat is provided by an electric current

Electric Furnace

Any furnace in which the heat is provided by an electric current

"A concretionary stone or pebble, hollow inside, and often having the walls of the cavity lined with crystals." -Whitney, 1911

Quartz Geode

"A concretionary stone or pebble, hollow inside, and often having the walls of the cavity lined with…

Skull of a Greek tortoise, showing the brain cavity.

Skull of Greek tortoise

Skull of a Greek tortoise, showing the brain cavity.

"The heart and the great blood-vessel attached to it, seen from the side towards the sternum. The left cavities and the vessels connected with them are colored red; the right black. Atd, right auricle; Adx and As, the right and left auricular appendages; Vd, right ventricle; Vs, left ventricle; Aa, aorta; Ab, innominate artery; Cs, left common carotid artery; Ssi, left subclavian artery; P, main trunk of the pulmonary artery, and Pd and Ps, its branches to the right and left lungs; cs, superior vena cava; Ade and Asi, the right and left innominate veins; pd, ps, the right and left pulmonary veins; crd and crs, the right and left coronary arteries." —Martin, 1917

Heart

"The heart and the great blood-vessel attached to it, seen from the side towards the sternum. The left…

"The heart vied from its dorsal aspect. ci, inverior vena cava; Vc, coronary vein; Atd, right auricle; Adx and As, the right and left auricular appendages; Vd, right ventricle; Vs, left ventricle; Aa, aorta; Ab, innominate artery; Cs, left common carotid artery; Ssi, left subclavian artery; P, main trunk of the pulmonary artery, and Pd and Ps, its branches to the right and left lungs; cs, superior vena cava; Ade and Asi, the right and left innominate veins; pd, ps, the right and left pulmonary veins; crd and crs, the right and left coronary arteries." —Martin, 1917

Heart

"The heart vied from its dorsal aspect. ci, inverior vena cava; Vc, coronary vein; Atd, right auricle;…

"<em>A, B</em>, right pulmonary veins, <em>S</em>, openings of the left pulmonary veins; <em>E, D, C, aortic valves; <em>R</em>, aorta, <em>P</em>pulmonary artery, <em>O</em>, pulmonic valves, <em>H</em>, mitraal valve; <em>K</em>, columnae carneae, <em>M</em> right ventricular cavity." &mdash; Blaisedell, 1904

Cavities of the heart

"A, B, right pulmonary veins, S, openings of the left pulmonary veins; E, D, C,…

Showing the brain cavity of a human.

Human skull

Showing the brain cavity of a human.

A lithophysa (plural lithophysae) is a small cavity found in felsic volcanic rocks believed to be caused by expanding gases in tuffs before solidification.

Lithophysa

A lithophysa (plural lithophysae) is a small cavity found in felsic volcanic rocks believed to be caused…

"Nasal Cavities, seen from Below. The sense of smell is located in the membrane which lines the cavities of the nose. This delicate membrane, over which the fibers of the olfactory nerves, or the nerves of smell, are distributed, is kept continually mois by the mucus which it secretes." &mdash; Blaisedell, 1904

Nasal cavities

"Nasal Cavities, seen from Below. The sense of smell is located in the membrane which lines the cavities…

"Skull of Polyodon. n, nasal cavity; sq, squamosal; mh, hyomandibular; sy, symplectic; pa, palate-pterygold; m, Meckelian cartiledge; mx, maxillary; d, dentary; h, hyoid; op, operculum; br, branchiostergal; s.cl, supraclavicular; p.cl, postclavicular; cl, clavicle; i.cl, infraclavicular." &mdash; Encyclopedia Britannica, 1893

Polyodon

"Skull of Polyodon. n, nasal cavity; sq, squamosal; mh, hyomandibular; sy, symplectic; pa, palate-pterygold;…

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella; g, entric cavity. In A an invagination of the ectoderm, which is more complete in B, represents the rudiment of the sub-umbrella space." &mdash; Encyclopedia Britannica, 1893

Sporosac

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella;…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Medualform person still attached by a stalk at the aboral pole to a colony." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Modified medusiform person, with margin of the disc (umbrella) united above and importforato (mouthless) manubrium." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac, with imcomplete extension of the enteric cavity into the umbrella,-rudimentary invagination above to form the sub-umbrella cavity." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac with manubrial portion only of the enteric cavity." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac without any trace of manubrium." &mdash; Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"<em>A</em>, enamel; <em>B</em>, pulp cavity; <em>C</em> dentine; <em>D</em>, cement." &mdash; Blaisedell, 1904

Longitudinal section of a tooth

"A, enamel; B, pulp cavity; C dentine; D, cement." — Blaisedell,…

A window with a hinged sash that swings in or out like a door comprising either a side-hung, top-hung, or occasionally bottom-hung sash or a combination of these types, sometimes with fixed panels on one or more sides of the sash.

Casement Window

A window with a hinged sash that swings in or out like a door comprising either a side-hung, top-hung,…