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DictionarySeetunicaEncyclopediaSeemuscularis externatunica muscularis
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 muscularisThe smooth muscle layer in the walls of organs such as the bronchi, intestines, and blood vessels.See also: tunica |