POP QUIZ:

How many types of human hair are there?

* See answer, S6

Pop Quiz Answer

There are three types of human hair:

* Lanugo, which covers the fetus from the fourth month of gestation and is shed during the ninth month.

* Vellus, which is short, fine and colorless and covers most of the body until puberty.

* Terminal, which grows on the scalp, eyebrows and eyelashes. At puberty, it replaces vellus in the pubic area and armpits. In most men and some women, the process continues on the limbs, face and trunk.

(Question on S1.)