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  • Smart Learning for All

  • Topic: Human hair

  • Why do we get goosebumps?

  • To burst balloons.

  • No.

  • Goosebumps served a purpose for our ancestors who had a lot of hair on their body.

  • When our ancestors felt cold, their adrenal glands produced adrenaline.

  • Adrenaline caused the arrector pili muscles which are attached to the hair follicles to contract.

  • Creating shallow depressions on the skin surface and making the hair stand straight up.

  • Thus causing goosebumps.

  • The straightened hair trapped more air which prevented their body heat from escaping.

  • Hence, kept them warm.

  • Also, when our ancestors felt afraid of any animal.

  • The adrenaline made their hair stand up making them look bigger and thus, scared their attacker.

  • It scares me too.

  • Now, as this characteristic of goosebumps is inherited by us.

  • We also get them during strong emotions or when it is cold.

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A2 US hair adrenaline attacker straightened adrenal stand

Why do we get Goosebumps? | #aumsum

  • 16 1
    AumSum posted on 2019/04/18
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