What is the function of body hair?
They have different functions depending on the area of the body.
On the head, they protect against solar radiation and the cold.
On the eyebrows, they prevent sweat from getting down and reaching the eyes.
In the ears, hair and earwax function as a protection to contain dirt particles, small insects and bacteria.
In the nostrils, hair functions as a natural filter that prevents dust particles from entering the airways, which is why the famous ‘snot’ forms on the outside of the nose.
In the armpits, hairs protect the skin from friction between the arms and the body.
Eyelashes protect the eyes.
In the intimate region, in women, they function as an initial protection of the vaginal canal against the entry of substances that can cause infection or disease. For men, they have no function nowadays, but in the past, they could have served to protect against the cold.
As for the other hairs we have on our arms, legs, back, etc., many scientists believe that they are just legacies from our ancestors who were much hairier.
