Head hair is especially important in preventing heat loss from the body.
Hair is actually composed of a protein called keratin.
Keratin is especially important in preventing heat loss from the body.
What is important in preventing heat loss from the body?
(a) hydration
(b) a cuticle
(c) stay warm
(d) sweating
(e) warmth
(f) skin
(g) keratin
(h) Animal fur