Hair bulb

Definition

The hair bulb is the enlarged, club-shaped structure at the base of the hair follicle containing the cells responsible for producing hair. It is where nutrients are delivered via blood vessels to fuel hair growth.

Related terms

Hair Follicle:

A skin organ that produces hair, consisting of the papilla, matrix, root sheath, and other structures that support hair growth.

Dermal Papilla:

A cone-shaped projection of connective tissue at the base of the hair follicle that provides blood supply to the hair bulb for nourishment and growth signals.

Keratin:

A type of protein that is a key structural component of hair, nails, and the outer layer of skin; it helps protect cells from damage or stress