terminaalikarvoja

Terminaalikarvoja, also known as terminal hair, refers to the longer, thicker, and often darker hair that grows on the human scalp and in areas like the armpits and pubic region. This type of hair is distinct from vellus hair, which is short, fine, and lightly colored, often referred to as "peach fuzz." The development of terminal hair is primarily driven by hormonal changes, particularly the influence of androgens, which become more prominent during puberty.

In males, androgens stimulate the growth of terminal hair on the face (beard, mustache), chest, abdomen, and limbs. Females also experience the growth of terminal hair in these areas, but typically to a lesser extent, influenced by estrogen and progesterone in addition to androgens. The distribution and density of terminal hair are significant secondary sexual characteristics. Genetic factors also play a crucial role in determining the pattern and extent of terminal hair growth, explaining individual variations. Conditions affecting hormone levels can also impact terminal hair growth, leading to either increased (hirsutism in women) or decreased (alopecia) amounts.