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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 ...
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 ...
of or pertaining to hair, hair-like structure Greek θρῐ́ξ (thríx), hair Trichocyst-tripsy: crushing Greek τρῖψις (trípsis), rubbing, friction Lithotripsy-trophy: nourishment, development Greek τροφή (trophḗ), food, nourishment Pseudohypertrophy-trop: turned toward, with an orientation toward, having an affinity for, affecting
Hair is a protein filament that grows from follicles found in the dermis.Hair is one of the defining characteristics of mammals.The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.
Medulla of the thymus, a part of the lobes of the thymus; Medulla of lymph node; Medulla (hair), the innermost layer of the hair shaft; Medulla, a part of the optic lobe of arthropods; Medulla (lichenology), a layer of the internal structure of a lichen; Pith, or medulla, a tissue in the stems of vascular plants
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.
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
The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft. [1] It is continuous with the basal layer of the interfollicular epidermis (skin) . See also