The body membrane that protects the body from water loss and harm to internal organs is called cutaneous membrane.
Cutaneous is a term relating to, existing on, or affecting the exterior skin, especially the cutis.
The cutaneous membrane is the technical term for our skin whose primary role is to help protect the rest of the body's tissues and organs from physical damage such as abrasions, chemical and biological damage.
The skin or cutaneous membrane is the outer protective layer of the body of any animal, including of a human.
Therefore, the body membrane that protects the body from water loss and harm to internal organs is called cutaneous membrane.
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