Hair grows when hair follicles pull nutrients from blood vessels beneath the skin to build keratin strands, which harden and are pushed upward through the follicle and out of the skin; sebaceous glands coat the hair in oil for flexibility and protection, and the follicle then enters a resting phase before the cycle repeats.
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How Your Hair Actually Grows 🤯 #shorts追加:
The explanation [music] of how the hair grows.
When a hair follicle is ready to grow, [music] it pulls nutrients from the blood vessels beneath your skin and uses them to build a strand of keratin.
>> [music] >> This keratin hardens and gets pushed upward through the follicle and out of your skin as it rises. The sebaceous gland coats it in oil, keeping it flexible and [music] protected. The follicle then enters a resting phase before the cycle starts again.
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