terminal hair
Thick, pigmented growth
Terminal hair is the thick, coarse, pigmented hair that grows on the scalp, eyebrows, and eyelashes, and after puberty on the face, underarms, and pubic area.
It contrasts with vellus hair, the fine, nearly invisible fuzz covering most of the body.
Hormonal changes convert vellus hair to terminal hair during puberty and, paradoxically, can convert scalp terminal hair back to vellus in pattern baldness.
Skin cavity growing strands
- keratinStructural hair protein
- melaninNatural coloring compound
- shaftNarrow vertical passage
- rootUnderground absorbing structure
cuticle · medulla · cortex · papilla · sebaceous gland · dermal papilla · pigmentation · trichology
Chief male sex hormone
- androgensMasculinizing steroid hormones
- 5-alpha reductaseSteroid-converting enzyme
- hirsutismAbnormal hair growth disorder
- virilizationDevelopment of male traits
Facial hair growth
Teenage developmental stage
- developmentProgress toward maturity
- maturationProcess of becoming complete
- hormonal changesFluctuations in body messengers
- growth spurtPeriod of accelerated physical development
adrenarche · voice deepening · sexual maturity · coming of age · teenage years · physical development
Hair growth's dormant stage
- sheddingLosing outer covering
- regrowthGrowing back again
- dormancySuspended biological activity
- regressionReturn to former state
follicle
Skin cavity growing strands
root · cuticle · medulla · cortex · papilla · sebaceous gland · dermal papilla · pigmentation · trichology · epidermis
coarse
Rough in texture
stiff · wiry · bristly · strong · dark · visible · rough · heavy · sturdy · textured
testosterone
Chief male sex hormone
- androgensMasculinizing steroid hormones
- 5-alpha reductaseSteroid-converting enzyme
- hirsutismAbnormal hair growth disorder
virilization · sex hormones · endocrine system · male pattern baldness
beard
Facial hair growth
adolescence
Teenage developmental stage
- developmentProgress toward maturity
- maturationProcess of becoming complete
- hormonal changesFluctuations in body messengers
growth spurt · adrenarche · voice deepening · sexual maturity · coming of age · teenage years · physical development
telogen
Hair growth's dormant stage
hair, terminal, terminate, termination, exterminate, interminable, terminus, indeterminate, determinate