tunica intima


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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.

tu·ni·ca in·ti·ma

[TA]
the innermost coat of a blood or lymphatic vessel; it consists of endothelium, usually a thin fibroelastic subendothelial layer, and an inner elastic membrane or longitudinal fibers.

tunica intima

the membrane lining an artery. See also arterial wall.

tu·ni·ca in·ti·ma

(tū'ni-kă in'ti-mă) [TA]
The innermost coat of a blood or lymphatic vessel; consists of endothelium, usually a thin fibroelastic subendothelial layer, and an inner elastic membrane of longitudinal fibers.

tunica intima

single layer of specialized cells on a basement membrane forming the lining membrane of the entire vascular system (including heart and lymphatics); acts as interface between blood (within vascular system) and extravascular tissues; non-thrombogenic surface that does not normally react with plasma clotting factors and platelets (i.e. clots only form on it in presence of vascular/haematological pathology); regulates levels of circulating vasoactive chemicals (e.g. bradykinin, serotonin [5-HT], angiotensin); controls tissue perfusion (by releasing nitric oxide, prostacyclin and endothelin) by affecting vasomotor tone and platelet function

tu·ni·ca in·ti·ma

(tū'ni-kă in'ti-mă) [TA]
The innermost coat of a blood or lymphatic vessel; consists of endothelium, usually a thin fibroelastic subendothelial layer, and an inner elastic membrane of longitudinal fibers.

tunica intima (too´nikə in´təmə),

n the membrane lining an artery.

tunica

pl. tunicae [L.] a covering or coat; a membranous covering of an organ or a distinct layer of the wall of a hollow structure, as a blood vessel. See also tunic.

tunica adventitia
the outer coat of various organs, blood vessels and other structures, usually made up of loose connective tissue.
tunica albuginea
a dense, white, fibrous sheath enclosing a part or organ, such as is present on the testis.
tunica albuginea ovarii
see tunica ovarii (below).
tunica conjunctiva
the conjunctiva.
tunica dartos
dartos.
tunica externa
an outer coat, especially the fibroelastic coat of a blood vessel.
tunica flava abdominis
an extensive sheet of elastic tissue that helps to support the abdomen. It is conspicuous in large animals as a yellow corset over the ventral abdomen and is a modified part of the deep fascia and aponeurosis of the external abdominal oblique muscle. It contributes to the deep fascia for the mammary gland or the scrotum.
tunica intima
the innermost coat of blood vessels; called also Bichat's tunic.
tunica media
the middle coat of blood vessels.
tunica mucosa
the mucous membrane lining of various tubular structures.
tunica muscularis
the muscular coat or layer surrounding the tela submucosa in most portions of the digestive, respiratory, urinary and genital tracts.
tunica ovarii
capsule of dense collagenous tissue, underlying the covering epithelium, covers each ovary. Called also tunica albuginea ovarii.
tunica propria
the proper coat or layer of a part, as distinguished from an investing membrane.
tunica serosa
the membrane lining the external walls of the body cavities and coating the surfaces of intruding organs; it secretes a watery exudate.
tunica vaginalis
the double-layered sleeve of peritoneum that lines the scrotum and inguinal canal (parietal layer) and invests the testis, epididymis and spermatic cord (visceral layer).
tunica vasculosa
a vascular coat, or a layer well supplied with blood vessels, e.g. of the eye.
tunica vasculosa lentis
vascular envelope of the lens in the developing fetus.
References in periodicals archive ?
From the histological point of view, vascular calcification represents a complicated, multifactor disease that can be classified as tunica intima calcium deposition (atherosclerotic calcification) or tunica media calcification (Monckenberg's sclerosis).
6B), also sections of developing caudal vena cava with valves that arose from tunica intima was encountered in all stages of foetal development (Fig.
The fibroma was found inside the tunica intima of the vessel, which was quite thick (Figure 3b).
vivipara with fibromas were observed, one in a more severe state, presenting a quite thick tunica intima in the vessel and the exocrine pancreas at an advanced stage of degeneration.
2,20) These observations are in contrast to what is known about the mechanism of atherosclerosis in other species and the current, widely accepted theory that atherosclerosis is initiated by endothelial dysfunction and the accumulation of oxidized lipoproteins in the tunica intima, which results in a chronic inflammatory response.
Our case presents similarities to atherosclerosis described in humans and other avian species in that lesions were primarily found in the tunica intima and the luminal side of the tunica media, and the lesions were composed, as demonstrated by histology and electron microscopy, primarily of extracellular lipids and foamy macrophages.
Lipid pools and cholesterol clefts, formed by deposits of lipid in the vessel wall, were also observed in the tunica intima of both categories.
Sites of deposition appear to correspond to areas in which elastin fibres and smooth muscle cells in the tunica intima and tunica media were disrupted (Fig.
In all the slides, thickness of tunica intima was measured from luminal border upto internal elastic lamina; tunica media was measured between internal elastic lamina and external elastic lamina whereas thickness of tunica adventitia was measured from external elastic lamina up to its outermost boundary which could be easily identified.
In our study, LAD at its origin presented a histological picture of that of an elastic artery, with tunica media being the thickest of all the three layers; tunica intima is relatively thick and tunica adventitia is relatively thin (Fig.