Skin is the foundation of the integumentary system, which also incorporates your hair, nails, and specialized glands and nerves.

皮肤是表皮系统基本组成部分，同时还包括头发、指甲、特定的腺体和神经。

The integumentary system is the organ system that protects the body from damage, comprising the skin and its appendages (including hair and nails).

皮肤是人体最大的器官。它可以防止异物进入，防止水分过多蒸发。