| tunica fibrosa renis | A fibrous membrane ensheathing the kidney. Synonym: capsula fibrosa renis, tunica fibrosa renis. (05 Mar 2000) |
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| tunica fibrosa splenis | The fibrous capsule of the spleen, containing collagen, elastic fibres, and smooth muscle. Synonym: tunica fibrosa splenis, tunica fibrosa lienis, capsula lienis, tunica propria lienis. (05 Mar 2000) |
| tunica interna bulbi | Light sensitive layer of the eye. In vertebrates, looking from outside, there are four major cell layers: (i) the outer neural retina, which contains neurons (ganglion cells, amacrine cells, bipolar cells) as well as blood vessels, (ii) the photoreceptor layer, a single layer of rods and cones, (iii) the pigmented retinal epithelium (PRE or RPE), (iv) the choroid, composed of connective tissue, fibroblasts and including a well vascularised layer, the chorio capillaris, underlying the basal lamina of the PRE. Behind the choroid is the sclera, a thick organ capsule. In molluscs (especially cephalopods such as the squid) the retina has the light sensitive cells as the outer layer with the neural and supporting tissues below. See: retinal rods, retinal cones, rhodopsin. (18 Nov 1997) |
| tunica interna thecae folliculi | <embryology> The inner cellular and vascular layer of the vesicular ovarian follicle. There is evidence that the epithelioid cells produce oestrogen and contribute to the formation of the corpus luteum after ovulation. Synonym: theca interna. (05 Mar 2000) |
| tunica intima | <anatomy> The innermost coat of blood vessels, consisting of a thin lining of endothelial cells longitudinally oriented and continuous with the endothelium of capillaries on the one hand and the endocardium of the heart on the other. (12 Dec 1998) |
| tunica media | <anatomy> The middle coat of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel. (12 Dec 1998) |
| tunica mucosa | <pathology> A mucous membrane or tunica mucosa. (18 Nov 1997) |
| tunica mucosa bronchiorum | The inner coat of the bronchi. Synonym: tunica mucosa bronchiorum. (05 Mar 2000) |
| tunica mucosa cavitatis tympani | The mucous layer of the tympanic cavity and the structures in it. Synonym: tunica mucosa cavitatis tympani, mucous membrane of tympanic cavity. (05 Mar 2000) |
| tunica mucosa coli | mucosa of colon |
| tunica mucosa ductus deferentis | The inner layer of the ductus deferens. Synonym: tunica mucosa ductus deferentis. (05 Mar 2000) |
| tunica mucosa gastrica | Surface epithelium in the stomach that invaginates into the lamina propria, forming gastric pits. Tubular glands, characteristic of each region of the stomach (cardiac, gastric, and pyloric), empty into the gastric pits. The gastric mucosa is made up of several different kinds of cells. (12 Dec 1998) |
| tunica mucosa intestini tenuis | The mucous coat of the small intestine. Synonym: tunica mucosa intestini tenuis. (05 Mar 2000) |
| tunica mucosa laryngis | The mucous lining of the larynx; mainly stratified squamous epithelium in the upper part and ciliated columnar in the lower part of the larynx. (12 Dec 1998) |
| tunica mucosa linguae | Mucous membrane of the tongue, the mucosa of the dorsum of the tongue appears velvety due to the presence of vast numbers of papillae; that of the inferior surface is smooth and thinner. Synonym: tunica mucosa linguae. (05 Mar 2000) |