What is the enlarged base of the hair root called?

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Multiple Choice

What is the enlarged base of the hair root called?

Explanation:
In hair anatomy, growth happens at the base of the follicle where the hair matrix cells divide. That enlarged bottom part is called the bulb. It sits at the end of the hair root inside the follicle and contains the actively dividing cells plus the dermal papilla that provides blood supply and nourishment for hair formation. The hair shaft is the portion that rises above the skin, while the root refers to the portion below the skin as a whole. Vellus hair is a type of fine hair, not a structural part of the follicle. So the enlarged base of the hair root is the bulb.

In hair anatomy, growth happens at the base of the follicle where the hair matrix cells divide. That enlarged bottom part is called the bulb. It sits at the end of the hair root inside the follicle and contains the actively dividing cells plus the dermal papilla that provides blood supply and nourishment for hair formation. The hair shaft is the portion that rises above the skin, while the root refers to the portion below the skin as a whole. Vellus hair is a type of fine hair, not a structural part of the follicle. So the enlarged base of the hair root is the bulb.

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