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Explain the term membrane

Explain the term membrane? Briefly explain it.

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The Membrane is any delicate sheet which separates one region from the other blocking or permitting (that is, selectively or completely) the passage of substances.

The skin, for illustration, can be considered as a membrane which separates the external from the internal of the body; cellophane, employed in chemical laboratories to separate solutions, performs as a membrane also.

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