epithelium

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ep·i·the·li·um

 (ĕp′ə-thē′lē-əm)
n. pl. ep·i·the·li·a (-lē-ə) or ep·i·the·li·ums
Membranous tissue composed of one or more layers of cells separated by very little intercellular substance and forming the covering of most internal and external surfaces of the body and its organs.

[New Latin epithēlium : epi- + Greek thēlē, nipple; see dhē(i)- in Indo-European roots.]

ep′i·the′li·al adj.

epithelium

(ˌɛpɪˈθiːlɪəm)
n, pl -liums or -lia (-lɪə)
(Anatomy) an animal tissue consisting of one or more layers of closely packed cells covering the external and internal surfaces of the body. The cells vary in structure according to their function, which may be protective, secretory, or absorptive
[C18: New Latin, from epi- + Greek thēlē nipple]
ˌepiˈthelial adj

ep•i•the•li•um

(ˌɛp əˈθi li əm)

n., pl. -li•ums, -li•a (-li ə)
any tissue layer covering body surfaces or lining the internal surfaces of body cavities, tubes, and hollow organs.
[1740–50; < New Latin < Greek epi- epi- + thēl(ḗ) teat + New Latin -ium -ium2]

ep·i·the·li·um

(ĕp′ə-thē′lē-əm)
The thin, protective layer of cells that covers most of the outer surface of an animal body and lines the inner surface of many body parts. In vertebrate animals, the outer layer of the skin, called the epidermis, is composed of epithelium.

epithelium

1. A type of animal tissue that covers inner and outer surfaces.
2. The layer of cells covering the body’s surface and lining the alimentary canal and respiratory and urinary tracts.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.epithelium - membranous tissue covering internal organs and other internal surfaces of the bodyepithelium - membranous tissue covering internal organs and other internal surfaces of the body
endothelium - an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities
mesothelium - epithelium originating in the embryonic mesoderm; lines the primordial body cavity
neuroepithelium - epithelium associated with special sense organs and containing sensory nerve endings
epithelial cell - one of the closely packed cells forming the epithelium
animal tissue - the tissue in the bodies of animals
decidua - the epithelial tissue of the endometrium
Translations
epitelvýstelka

epithelium

[ˌɛpɪˈθiːlɪəm] nepitelio

ep·i·the·li·um

n. L. epitelio, tejido que cubre las superficies expuestas e interiores del cuerpo;
ciliated ______ ciliado;
columnar ______ columnar;
cuboidal ______ cuboidal;
squamous ______ escamoso;
stratified ______ estratificado;
transitional ______ de transición, transicional.
References in periodicals archive ?
In the late vitellogenic oocyte, exogenous substances, namely, glycogen particles and lipid granular substances appeared in the germinal epithelium passed into the ooplasm through the microvilli of the vitelline envelope.
Given the unique nature of sea urchin gametogenesis, in which NPs play such a pivotal role, it is appropriate to reinvestigate the germinal epithelium in both sexes with the goal of defining the intimate structural relationships of NPs and germ cells throughout gametogenesis.
Germinal epithelium consisted of a few layers of cells and small clusters of sperm lined the lumina of the seminiferous tubules.
Using image analysis, the percent of germinal epithelium and nutritive phagocytes and long diameters of oocytes were measured from H&E prepared slides of gonad tissue.
Previous studies in male reproductive system have demonstrated that MTX can damage seminiferous tubules resulted in disorganization and vacuolization of germinal epithelium (Johnson et al, 1994; Chelab & Majeed, 2009).
Results: On histological examination the testes of animals of group B showed statistically significant decrease in Johnsen score (p-value less than 0.001) with disruption of germinal epithelium and absence of mat-ure sperms.
There was slight disruption of germinal epithelium and vacuoles were observed in tunica albuginea.
However, the presence of daughter cysts, germinal epithelium detachment and calcification may confirm the diagnosis.
Ovarian germinal epithelium and folliculogenesis in the common snook, Centropomus undecimalis (Teleostei: Centropomidae).
Males followed a seasonal testicular cycle (Table 1) in which three stages were represented: (1) Regression (non-reproductive) in which the germinal epithelium is exhausted and the predominant cells are Sertoli cells and spermatogonia; (2) Recrudescence (recovery) characterized by renewal of the germinal epithelium for the next period of sperm formation; primary and secondary spermatocytes are the predominant cells; (3) Spermiogenesis (sperm production) in which the seminiferous tubules are lined by clusters of spermatozoa and metamorphosing spermatids; the epididymides are packed with sperm.
The inner layer also had three layers: the coelomic epithelium, a connective tissue layer, and the inner germinal epithelium (Fig.
Therefore, this investigation attempted to demonstrate cellular immunolocalization and expression patterns of tyrosine phosphorylated proteins in both germinal epithelium and interstitial tissues of Sprague-Dawley rats.