INTEGUMENTERY SYSTEM
DERMIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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hair bulb
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hair root
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hair shaft
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hair follicle
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Detailed explanation-1: -Each hair has a hair shaft and a hair root. The shaft is the visible part of the hair that sticks out of the skin. The hair root is in the skin and extends down to the deeper layers of the skin. It is surrounded by the hair follicle (a sheath of skin and connective tissue), which is also connected to a sebaceous gland.
Detailed explanation-2: -Each hair shaft is made up of two or three layers: the cuticle, the cortex, and sometimes the medulla.
Detailed explanation-3: -It may serve several functions, including seasonal thermal adaptation, cleansing the body surface, elimination of defective hair follicles, and protection from malignancy (Cotsarelis, 1997; Courtois et al., 1996; Paus, 1998; Randall and Ebling, 1991).