The integumentary system is the physical system that forms the barrier between the external environment and the internal systems of the body. In humans, this system consists of skin, hair, nails, and ...
Systematics and body form / Leonard J. V. Compagno -- Integumentary system and teeth / Norman E. Kemp -- Endoskeleton / Leonard J. V. Compagno -- Muscular system: gross anatomy and functional ...
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