题目内容
Goosebumps appear when people feel cold, andcause hair to stand upright across the body. (two words)
查看答案
搜索结果不匹配？点我反馈
更多问题
Skin is the largest organ in our body.
Sebum is an oily substance that's secreted onto the skin's surface by sebaceous glands nestled inside the hypodermis.
Under warm conditions, the skin's sweat glands will secrete sweat via ducts onto the surface, transferring heat out of the body.
The average human has 5 million hair follicles embedded everywhere on the body.
微信支付 
支付宝支付