the arector pili muscle.
If you have goosebumps
Goosebumps.
Goosebumps.
skin
goosebumps are when you have lattes of little bumps on your skin
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you get goosebumps.
we all get goosebumps when it is cold because your skin sqeezes together to keep heat inside your body
People experience goosebumps in a black and white school setting due to a physiological response called piloerection, triggered by emotions like fear or excitement. This response causes tiny muscles at the base of hair follicles to contract, creating the appearance of raised bumps on the skin.
Goosebumps can only form where you have hair follicles. The bump is formed by the muscle causing the hair to stand up straight when you are cold or scared or whatever else causes you to get goosebumps. But on hairless areas of your body, you will not get goosebumps.
It depends on what kind-- Goosebumps, well, is when your either cold or afraid.
There are many many many ways to get goosebumps, one of the more common ways is when you are cold. Goosebumps are really tiny muscles in your skin contracting, making the skin bunch up that surround the hair, which result in goosebumps. The body preserves heat this way, which is why the hairs stand up, thus reducing heat loss. :)