On it are found little islands, red, marginated, deprived of epithelium.
epithelium: the layer of cells which covers a surface or lines a cavity.
The lens of the eye is formed in the embryo from the epithelium lying above the so-called optic cup (the primitive retina).
In stripping the head from the cornea some of the epithelium may be torn off with it.
This type of epithelium is found covering surfaces commonly exposed to friction.
The thickness of the epithelium at this stage is about 0.04 mm.
The larger the ova the more columnar is the epithelium of the follicle.
It is formed of a core of stroma and a covering of epithelium.
There may be congestion of the palate without tumefaction, its epithelium undergoing detachment in shreds.
The epithelium at the outer end of the tube was also deeply pigmented.
epithelium ep·i·the·li·um (ěp'ə-thē'lē-əm)
n. pl. ep·i·the·li·ums or ep·i·the·li·a (-lē-ə)
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.
The thin, membranous tissue that lines most of the internal and external surfaces of an animal's body. Epithelium is composed of one or more layers of densely packed cells. In vertebrates, it lines the outer layer of the skin (epidermis), the surface of most body cavities, and the lumen of fluid-filled organs, such as the gut or intestine.