Hair holders {hair follicle}| have growing and non-growing phases. Dermal papilla are deep in dermis, organize hair follicles, and start hair matrix. Wnt signaling proteins induce hair follicles and control hair-growing cycle. Hairs fall out after bottom cells die.
region
Hairs have inner and outer sheathes. Hair follicles have attached muscles, which can form goosebumps, and nearby sebaceous glands.
curl
Flat follicles make curly hair.
color
Hair, fur, and feathers are dead skin cells. Pigments, air bubbles, and rough or smooth surfaces cause color.
Biological Sciences>Zoology>Organ>Skin>Hair
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Date Modified: 2022.0224