Pattern baldness, more common in males than females, involves the gradual replacement of intermediate scalp hair with fine vellus hair. Hair comes in different shapes. It is almost always black and is found in people of African ancestry. Straight coarse long hair is the hair of the Chinese, the Mongols, and Indians of the Americas. It is usually black.
Flat hair is curly or frizzy.
It is found in Australian natives. Oval hair is wavy and curly or smooth and silky. It is the hair of Europeans and comes in various colors. The average hair of Japanese women is 1.5 times thicker than that of Caucasians. The life of a hair goes in 3 phases.