Hairier

Hairier

Hairier

Humans and other animals experience goosebumps (also called gooseflesh or goosepimples), known as piloerection, when they are cold or scared. The hair or fur stands up due to contraction of pili muscles (pili = hair).

Why do Humans and Animals get Goosebumps When They are Cold?

Animals (including humans) use different mechanisms to regulate the exchange of heat between the environment and themselves. This may include: