Which of the following explains why epithelial tissue cells are tightly packed with very little space between them?
To form a continuous barrier and regulate permeability
Epithelial tissue covers the outer surface of the body and lines internal cavities and organs, so its primary role is to act as a protective covering between the body and its environment.
Because of this role, epithelial cells are arranged very close together with little or no intercellular space, forming a continuous sheet that no substance can pass through without being regulated.
This tight packing allows the epithelium to selectively control the movement of water, ions and nutrients between the inside and outside of the body.
Hence, the correct answer is To form a continuous barrier and regulate permeability.
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