Goosebumps appear when people feel cold, andcause hair to stand upright across the body. (two words)
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Skin is the largest organ in our body.
A. 对
B. 错
Sebum is an oily substance that's secreted onto the skin's surface by sebaceous glands nestled inside the hypodermis.
A. 对
B. 错
Under warm conditions, the skin's sweat glands will secrete sweat via ducts onto the surface, transferring heat out of the body.
A. 对
B. 错
The average human has 5 million hair follicles embedded everywhere on the body.
A. 对
B. 错