Answer:
The covering or protective tissue in the
animal body are epithelial tissues. Epithelial tissue cells are tightly packed
and form a continuous sheet. They have only a small amount of cementing
material between them and almost no intercellular spaces. Epithelium covers
most organs and cavities within the body. It forms a barrier to keep different
body systems separate. The skin, the lining of the mouth, the lining of blood vessels,
lung alveoli and kidney tubules are all made of epithelial tissue.
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