The filaments in their further growth separate the epithelia, and even penetrate them.
Between these chambers the separating strata of epithelia are compressed so as to form septa or partition walls.
Mucus is a viscid fluid secreted by the gland-cells, or epithelia.
After the first poisoning, the epithelia are permanently injured and remain more permeable to protein.
The epithelia of the rete mucosum are swollen and stretched.
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.