tunica muscularis


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Related to tunica muscularis: Muscularis externa, Muscular coat

tunica

 [too´nĭ-kah] (L.)
a tunic or coat; used in anatomic nomenclature to designate a membranous covering of an organ or a distinct layer of the wall of a hollow structure, as a blood vessel.
tunica adventi´tia the outer coat of various tubular structures.
tunica albugi´nea a dense white fibrous sheath that encloses a part or organ, such as the testicle or ovary.
tunica conjuncti´va the conjunctiva.
tunica dar´tos dartos.
tunica exter´na an outer coat, such as the fibroelastic coat of a blood vessel.
tunica inter´na an inner coat or layer.
tunica in´tima the innermost coat of a blood vessel; called also Bichat's tunic.
tunica me´dia the muscular middle coat of a blood vessel.
tunica muco´sa the mucous membrane lining of various tubular structures.
tunica muscula´ris the muscular coat or layer surrounding the tela submucosa in most portions of the digestive, respiratory, urinary, and genital tracts.
tunica pro´pria the proper coat or layer of a part, as distinguished from an investing membrane.
tunica sero´sa the membrane lining the external walls of the body cavities and reflected over the surfaces of protruding organs; it secretes a watery exudate.
tunica vagina´lis tes´tis the serous membrane covering the front and sides of the testis and epididymis.
tunica vasculo´sa a vascular coat, or a layer well supplied with blood vessels.

muscular layer

[TA]
the muscular, usually middle, layer of a tubular structure; for most of the gastrointestinal tract, it consists of an outer longitudinal layer of muscle and an inner circular layer.
Synonym(s): tunica muscularis [TA], muscular coat

tunica muscularis

The smooth muscle layer in the walls of organs such as the bronchi, intestines, and blood vessels.
See also: tunica
References in periodicals archive ?
Table II.- Effect of Oregano onites on the villus height, crypt depth and thickness of tunica muscularis in different experimental groups.
The tunica muscularis was made up of two layers of smooth muscles; inner circular and outer longitudinal layer.
In this particular case only the adventitia and tunica muscularis were considered abnormal; therefore a type 1 stricture was considered the most likely diagnosis.
Villus height, crypt depth, epithelial cell height, ratio of villus height to crypt depth, tunica muscularis externa and tunica submucosa were analysed using a linear model including dietary treatment, region of the small intestine, and the interaction between dietary treatment and region as fixed effects, and piglet nested within diet as a random effect.
The tunica muscularis is composed of smooth muscle arranged in inner circular (cm) and outer longitudinal (lm) layers.
Tunica muscularis of the intestine included the internal circular muscle layer and the external longitudinal muscle bundles.
The submucosa contains both loose and dense collagenous tissue and the tunica muscularis is well-developed with extensive fibrous fibers.
(B) Cross section of the ureter stained by Verhoeff's showing abundant amount of elastic fibers (black arrowheads) in lamina propria (lp), submucosa (Sm), tunica muscularis (Tm) and serosa (Ts).
Observable histological lesions were also variable, being absent in some cases, or characterized by inflammatory or degenerative alterations of the myenteric plexus or by atrophy and degenerative lesions of smooth muscle cells of the tunica muscularis [14, 16-19].
The tunica muscularis was constituted by a thick inner layer of circular muscle and an outer layer of longitudinal muscle.
TERMINOLOGIA ANATOMICA A05.4.01.001 OESOPHAGUS A05.4.01.002 Pars cervicalis; Pars colli A05.4.01.003 Pars thoracica A05.4.01.004 Constrictio partis thoracicae; Constrictio bronchoaortica A05.4.01.005 Constrictio phrenica; Constrictio diaphragmatica A05.4.01.006 Pars abdominalis A05.4.01.007 Tunica serosa A05.4.01.008 Tela subserosa A05.4.01.009 Tunica adventitia A05.4.01.010 Tunica muscularis A05.4.01.011 Tendo cricooesophageus A05.4.01.012 M.
The gizzard did not have the lamina muscularis mucosae and tunica submucosa, and the simple tubule glands were directly merged with the tunica muscularis.

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