The hair itself, together with the fingernails, is made of flattened keratinized cells thickly stacked together. Melanin granules secreted around these cells give hair its color which can vary as can skin by the amount and color of the melanin granules. Terminal (coarse) hair has both a medulla and cortex, and is typical of male body hair and pubic hair in both sexes. Fine vellus hairs, which are typical of women and children, are thinner because they lack the dense medulla. Even bald men have hair on their heads, but it is of the vellus type.