Caucasions have thinner hair but have the highest concentration of hairs on their heads, averaging two hundred hairs per sq. centimeter.
It protects us from the sun.

Asians generally have thick and coarse hair. They may appear to have more hairs but they average less than the Caucasians at about one hundred and fifty hair per sq. centimeter.

People of African descent actually have the thinnest and finest hair. The way they mat together make them appear to the thickest among the racial group. The average concentration is about one hundred and thirty per sq. centimeter.