Which type of tissue appears as sheetlike arrangements of cells, sometimes several layers thick, that form the outer surface of the body and line the body cavities and principle tubes leading to outside the body

Epithelial tissue

Explanation:

Epithelial tissue is one of the four basic types of tissue, whereas the other ones are muscle tissue, nervous tissue, and connective tissue. Epithelial tissue is composed of cells that make up the covering of the body surfaces and blood vessels throughout the body. This tissue plays many critical roles including, among others, protection (coverage), filtration, diffusion, absorption, secretion, excretion, etc. An example of epithelial tissue is the epidermis, the outermost of the three layers that form the skin.  Epithelial cells can be arranged in a single layer (i.e., simple epithelium) or in multiple (stratified) layers.

answer: 45

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