Tissues in the Body
Epithelial, Connective, Muscle, and Nervous
Epithelial Tissue covers the surface of the body. It is composed of closely packed cells arranged in one or more layers. The tissue also lines the insides of organs in the body. Epithelial tissue is classified by the cell's shape and arrangement. The shape of the cells can be squamous (flat), cuboidal (cube shaped), or columnar (elongated). The arrangement can be simple (one layer) or stratified (multi layer). The Epithelial tissue functions in protection, sensation, secretion, absorption, excretion, diffusion, cleaning, and reduces friction.