Your hair stands up and you get goosebumps
goose bumps are formed
''goose bumps'' are formed
Arrector pili muscles
the arrector pili muscles contract to stand hairs upright
Arrector pili is the muscle the raises hair. This is taught in health class.
Yes, arrector pili muscles are associated with hair follicles. Arrector pili muscles are in the skin, connected to the hair follicles. Their job is to help maintain body homeostasis. When we are cold, the arrector pili muscles shorten, causing our hairs to stand up so that they block the cold and help keep heat from escaping. Although this is not very effective in humans because evolution has made us less hairy, this is great method for hairy animals to stay warm. Now you know why we get "goosebumps" when we are cold! :)
Goosebumps are caused by little muscles called the arrectores pilorum (the hair erector muscles). Contraction of these muscles elevates the hair follicles above the rest of the skin. And it is these tiny elevations we perceive as goose bumps. Source: http://www.medicinenet.com/script/main/art.asp?articlekey=6842
When we are cold, the arrector pili muscles contract and pull on the hair bulb, standing the hair in a more erect position. This was an evolutionary response to allow the hair to trap more air and thus give us a better insulation factor. Unfortunately, with our "skimpy fur" this really does not do much good. What we see are little bumps on our skin where the arrector pili muscles have contracted. We call those little bumps, "goose bumps".
no
arrector pili.
The arrector pili and epidermis are related only in that the action of the arrector pili causes "goosebumps" to form at the epidermis.
The muscles are called arrector pili and they pull the hair upright for both of those reasons and a few others.. let me know if you want to know more :)
An arrector pili is any of a group of small muscles attached to hair follicles in mammals, the contraction of which causes the hairs to stand on end.