Terminal hair refers to the thick, pigmented hair that grows on various parts of the body. It is different from Vellus hair, the fine, thin and often barely visible hair that covers most of the human body. Terminal hairs are characteristic of certain areas of the body and are a sign of sexual maturation that occurs during the puberty sets in.
Properties of terminal hair
- Thickness and texture : Terminal hairs are thicker, longer, and have a coarser texture than vellus hairs.
- Color : They tend to be more pigmented, which gives them their darker color.
- Growth Areas : Terminal hair grows on the scalp, face (beards and mustaches in men), armpits, genital region, and chest and back in men.
Development of terminal hair
The conversion of vellus hair to terminal hair is triggered by hormonal changes during puberty, particularly by Androgens, the male sex hormones that occur in both men and women. The density, distribution and thickness of terminal hairs can be genetically determined and vary depending on gender, age and individual hormonal levels.
Functions of terminal hair
- Protection : Terminal hairs in the nose and ears help trap foreign objects and dirt.
- Thermal insulation and regulation : Hair in the armpits and genital region contributes to thermal insulation and aids in the evaporation of sweat, which helps cool the body.
- Sexual Maturity : The development of terminal hair in certain areas is a secondary sexual characteristic that indicates sexual maturity.
Changes in the course of life
- Aging : With aging, terminal hair can revert to vellus hair due to hormonal changes, especially on the head, causing hair loss or thinning.
- Hormonal factors : Hormonal imbalances, such as those found in conditions such as polycystic ovary syndrome (PCOS), can lead to increased growth of terminal hair in unusual places.
Care of terminal hair
Terminal hair care may include regular washing, cutting, and removal when necessary, depending on personal preference and cultural norms. Hair removal methods range from shaving and Grow to more permanent solutions such as Laser hair removal and electrolysis.
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