<b>Epithelium (Covering)</b>
is a sheet of cells that covers a body surface or lines a body cavity

Epithelial tissue occurs in two different forms:
<em>Covering and lining epithelium </em>covers the outer and inner surface of the body and organs
<em>Glandular </em><em>epithelium </em>forms most of the body glands

<strong>Glands</strong>
Epithelial cells that make and secrete a product