Why Do We Have Fingernails?

Why Do We Have Fingernails? image 0

Why do we have fingernails? Our fingertips are made of keratin, the same protein found in hair, fur, and claws. Their wide, flat surface protects the tips from injury and provides rigid backing for small objects. In a long-gone evolutionary stage, fingernails probably helped humans catch body lice. They also helped us … Read more

Exit mobile version