The arrector pili muscle is found in the skin. This tiny muscle is connected to each hair follicle. When it contracts, it causes the hair to stand erect, creating the familiar "goosebumps" on the skin.
The arrector pili muscle is found in the skin. This tiny muscle is connected to each hair follicle. When it contracts, it causes the hair to stand erect, creating the familiar "goosebumps" on the skin.
