CBL - Tissues Lesson
Tissues
The next level of organization in the human organism is tissues. Tissues are composed of layers of similar cells with a common function. Cell differentiation, including size, shape, organization and function, defines the tissue type. Four major types of tissues are found in the human organism: epithelial, connective, muscle, and nervous.
Epithelial Tissues
Epithelial tissues are found throughout the human organism. Epithelial cells form sheets of tissue and are commonly referred to as the epithelium. This tissue type functions as the covering of the outer surface of the body and the lining of body cavities, and forms certain glands found throughout the body.
Epithelial tissue is classified based on the geometric shape of the individual cells.
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