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What is a membrane?



What is a membrane?

Membrane, or the membrane, fine, elastichesky fabrics serving in an animal organism usually for office from each other of cavities or two layers of cages.
the Doctrine about properties of a membrane, about passability conditions through them various liquids of a body (in particular in digestion) makes important department of physiology. Distinguish membranes: an eardrum (in an ear), swimming, blink. The membrane is the swimming, thin membrane of skin tense between fingers natatorial, mainly at birds (among mammals is available only for a duck-bill).
Is observed also at the person and other vertebrata during the embryonic period. Studying of development it at a human germ is of great importance as the evidence of water origin of vertebrate animals.