tunica media


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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 me·di·a

[TA]
the middle, usually muscular, coat of an artery or other tubular structure.
Synonym(s): media (1)

tu·ni·ca me·di·a

(tū'ni-kă mē'dē-ă) [TA]
The middle, usually muscular, coat of an artery or other tubular structure.
Synonym(s): media (1) .

tu·ni·ca me·di·a

(tū'ni-kă mē'dē-ă) [TA]
The middle, usually muscular, coat of an artery or other tubular structure.
Synonym(s): media (1) .
References in periodicals archive ?
SMC-Specific STAT5a-/- Deletion Leads to Reduced BCL6 Expression in Pulmonary Arterial Tunica Media. We used quantitative immunofluorescence methods to investigate whether BCL6 might be downstream of STAT5 in SMCs in the pulmonary arterial vasculature.
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).
(a) and (b) Normal ICA with uniform thickness, regular fiber arrangement, and complete structure of tunica adventitia, media, and intima in the Non-CRM-Normal group and CRM-Normal group; (c) atherosclerotic ICA with slightly thickened intima (red arrows), edematous cells, thinly stained cytoplasm, and disordered cells arrangement (black arrows) in the Non-CRM-Model group; (d) atherosclerotic ICA with severe thickened and atherosclerotic intima, disordered fiber arrangement, and infiltration of foam cell (black arrows) and the calcified lesion at the junction between the tunica adventitia and tunica media (blue arrows) in the CRM-Model group.
It was observed that percentage thickness of tunica media was greatest in the fourth decade (72.4 [+ or -] 2.2%) and after 40 years of age there was a slight reduction in the thickness of tunica media with respect to the full wall.
Moreso, sections of ductus arteriosus with lumen, tunica intima, prominent tunica media and thin tunica adventitia were equally observed in all foetal age groups (Fig.
Proximal left coronary artery featuring inflammatory infiltrate in the tunica adventitia and tunica media, with dissection of tunica media and resultant narrowing of the vessel lumen (hematoxylin-eosin, original magnification X200).
Proliferation of adventitial vasa vasora and their invasion into the tunica media and intima, called mural neovascularization, as observed in the present study, facilitate pathogenesis of atherosclerosis by providing a considerable endothelial exchange surface for harmful circulating substances and cells to the vessel wall [25-27].
At the end of experiment, aortas were examined pathologically by H&E staining, which displayed significantly increase of the tunica media thickness in T2DM mice (Figure 2(a)).
This is especially true if there is destruction of the tunica media. The cause of Takayasu's arteritis is not yet known, but it is more common in young females.
Histopathologically all coronary aneurysms involve destruction of the tunica media which is thinned, sometimes markedly, sometimes to the point of no longer being identifiable between the tunica intima and tunica adventitia.
SMC constitute the middle layer of larger blood vessel walls (tunica media), and SMC proliferation accounts to the progression of atherosclerotic transformation leading to blood vessel stenosis as well as to restenosis often occurring in the medically treated blood vessel area (4).
The tunica media contained fragmented elastic layers separated by extracellular matrix (Figs 3G and H).