Tulane University defines an ore as a body of material from which one or more valuable substances can be extracted. For example, bauxite ore is mined and refined to extract aluminum.
root sheath the epidermic layer of a hair follicle. sheath of Schwann neurilemma. synovial sheath synovial membrane lining the cavity of a bone through which a tendon moves. tendon sheath a lubricated fibrous or synovial layer of tissue in which the tendon is housed and through which it moves.
The hair shaft is the part of the hair not anchored to the follicle, and much of this is exposed at the skinâs surface. The rest of the hair, which is anchored in the follicle, lies below the surface of the skin and is referred to as the hair root.