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ICEV Animal Science Certification Practice Exam

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Which part of the skin houses the hair follicles?
Correct Answer:
Dermis
Explanation:
Hair follicles are located in the dermis. The epidermis is the outer protective layer, while the dermis is the middle, thicker layer that houses hair follicles, sebaceous glands, nerves, and blood vessels. A hair follicle begins as an inward growth (an invagination) of epidermal cells that extends down into the dermis, where the hair bulb receives blood supply from the surrounding dermal tissue. This dermal environment provides the nutrients and signals necessary for hair growth and pairs with associated structures like the arrector pili muscle and sebaceous glands. The deepest layer, the hypodermis (subcutaneous tissue), is mainly fat and connective tissue and does not contain hair follicles.

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