Why do we get goosebumps from either seeing a certain someone, or hearing a song or..?
Why do we get goosebumps? “Goosebumps” or “goose flesh” is known in medical terminology as piloerection (pil is from the Latin word for hair). People experience this phenomenon when they are cold or frightened. The hair is able to stand on end due to the contraction of the pili muscles at the base of the hairs. When they are triggered by external stimulus, the tiny muscles become hyperactive and the hair stands up straight. Because humans have very short hairs, our highly visible skin displays many small bumps as the pili muscles contract. All mammals are capable of piloerection. Some scientists think it is used for warmth. The fluffing of hair or fur creates a barrier between the sensitive mammalian skin and the cold environment. Within the hair area pockets, warm air is trapped, keeping the animal protected. Piloerection may also be a defensive reaction. With all of its hair standing on end, the animal would look larger, causing a predator to look for less imposing prey.
