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  2. Hair - Wikipedia

    en.wikipedia.org/wiki/Hair

    the hair shaft, which is the hard filamentous part that extends above the skin surface. It is made of multi-layered keratinized (dead) flat cells whose rope-like filaments provide structure and strength to it. The protein called keratin makes up most of its volume. A cross section of the hair shaft may be divided roughly into three zones.

  3. Cortex (hair) - Wikipedia

    en.wikipedia.org/wiki/Cortex_(hair)

    Diagram of the hair shaft, indicating medulla (innermost), cortex, and cuticle (exterior.) Anatomy of hair. The cortex of the hair shaft is located between the hair cuticle and medulla and is the thickest hair layer. It contains most of the hair's pigment, giving the hair its color. The major pigment in the cortex is melanin, which is also ...

  4. Medulla (hair) - Wikipedia

    en.wikipedia.org/wiki/Medulla_(hair)

    Anatomy of hair Diagram of the hair shaft, indicating medulla (innermost), cortex, and cuticle (exterior.) The medulla is the innermost layer of the hair shaft. This nearly invisible layer is the most soft and fragile, and serves as the pith or marrow of the hair. Some mammals don't have a medulla in their hair. The presence or absence of this ...

  5. Hair follicle - Wikipedia

    en.wikipedia.org/wiki/Hair_follicle

    The hair follicle is an organ found in mammalian skin. [1] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells. [1]

  6. Cuticle (hair) - Wikipedia

    en.wikipedia.org/wiki/Cuticle_(hair)

    The hair cuticle is also known to contain anteiso-18-methyleicosanoic acid which contribute to the hydrophobic properties of hair. [5] [4] Diagram of the hair shaft, indicating medulla (innermost), cortex, and cuticle (exterior) While the cuticle is the outermost layer, it is not responsible for the color of the hair.

  7. Human hair growth - Wikipedia

    en.wikipedia.org/wiki/Human_hair_growth

    Hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope-like filaments provide structure and strength to the hair shaft. The protein called keratin makes up hair and stimulates hair growth. Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen. Each ...

  8. The best hair growth products for women in 2025, tried ... - AOL

    www.aol.com/lifestyle/best-hair-growth-products...

    The oil helps to create an all-over healthy scalp environment for hair to grow, starting with nourishing the scalp, hair follicles and hair shaft root to tip while also reducing inflammation and ...

  9. Hair matrix - Wikipedia

    en.wikipedia.org/wiki/Hair_matrix

    The hair matrix, or simply matrix, produces the actual hair shaft as well as the inner and outer root sheaths of hair. [1] References This page was last ...