What muscles are responsible for making hairs stand on end?
88811
arrector pili\n\nResponding to miamyk, \n\nwhether it is correctly arrector or erector is a matter of some debate ATM. Either of them is technically correct but arrector is currently the preferred spelling.\n\nErrector, which you used, is never correct.\n\nA Google search for erector returns 115 results from educational sites and 683 from all sites.\n\nArrector returns 633 from educational sites alone and 16, 800 from all sites.\n\nerrector returns 90 sites total, and is never used by eductaiona sites.
945337
I think I know what you mean.   Hairs, sweat glands, sebaceous glands and nails are structures associated with the skin.  Check out this site for more explanation of skin appendages it can explain them in more detail than I can.
1083525
It's called a unibrow.\n\nYea, just shave it off or pluck it.
103630
Ok, just from memory, some of the main muscles are:\nSerratus, trapezius, rhomboids, levator scapulae: these keep the scapula in place and rotate it.\nDeltoids, teres, part of the triceps: they move the humerus.\nSupraspinatus, infraspinatus, subscapularis: these keep the humeral head in place and help move the humerus.\nThere are other muscles and some of the ones I mentioned may be differentiated into different parts.
68263
Interestingly enough, when you cut pubic hair, arm or armpit hair or shave legs, the hair grows back to exactly the same length as it was before!\n\nHair follicles in those areas are programmed and have on and off activation.
303828
Bone cells are roundish while muscle cells are long fibers.
928836
humans are born with hair. it may be miniscule, or ridiculously fine, but its definitely there. by hair, we don't just mean on the top of the head, hair can be anywhere on the body, including the fine hairs on your arms and stuff.\nthe most hairless mammal i can think of is a whale; they only have hair on their lips.
720536
hair actually covers all the body surface, except for palm of hands, sole of feet, eyes, lip/mouth, and nails.  Some of hairs on our body may be very small or thin for us to realize.
507050
Yes, your muscles tighten up, especially around your neck and head, cutting down the circulation of the blood. Really kills the hair folicles. Do some stretching exercises every day to keep the muscles loose and the blood flowing.
582572
I'm gonna assume that the pituitary gland in you brain regulates the hair growth and stops sending the hormones necessary for it to grow once it realizes how long it is.
743630
Actually, your hair keeps growing throughout your life (excluding the upper scalp hair on some men). It's just that the hair folicles each have a programed length to which the hair shaft will grow. When the shaft reaches that length, it falls out and a new one starts to grow. Obviously, for some folicles, this programed length is longer than it is for others. That is why body hair is usually shorter than head hair. This is also why it is silly for a man to start worrying about going bald just because he sees some hairs in his brush. We are all constantly shedding hairs that have reached their maximum length. So, seeing a few hairs come off is normal. You only need to worry about it if you see an actual thinning of the hair.
654501
You have two different types of bodily hair.  One is called terminal and the other is called vellus.  Terminal hair is the longer growing hair that is on your head, legs and things like that.  So, to answer why do they keep growing it is bc of the type of hair it is.  The vellus hair doesn't know how long it is....it only grows to a certain length according to your own body type.  I hope this helped a little bit
79837
The main function of the root hairs is to increase the area of absorption of the root.
41719
No, frogs do not have hair (only mammals do). So I guess "Fine as Frog Hair" means "so fine it doesn't exist"...\nHowever, there is a species of African frog with hair-like outgrowths that function as breathing aids. These appear only in the males during the breeding season. The species is called Trichobatrachus robustus (that's Greek for "hairy sturdy toad").
1144841
The facial muscles are like elastic sheets that are stretched in layers over the cranium, facial bones, the openings they form, and the cartilage, fat, and other tissues of the head. These are the muscles of facial expression, acting singly and in combination. The diagram below shows a simplified view of how the facial muscles are actually arranged. It has a cut-away view of some of the muscles on the right side of the image to show the layers. Move the mouse cursor over the diagram of facial muscles below and click on a facial muscle of interest to see more information. Most of the muscles have a short video that illustrates the appearances that are produced when the muscle acts. Innervation and blood supply are also indicated. (MPEG 1 plugin is needed to view the videos.) For more detailed depictions of facial anatomy, see the Anatomy pages.
1067448
i think theyre raised hair follicles. My friend has them too yea their pretty common.. i dont have them but a lot of ppl i know do. Its just where they grow
524656
It is the root from which the hair is produced.  No, plucking it out with the hair will not prevent it from growing back.