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ReneBoth hair follicles and the epidermal layer of skin are part of the integumentary system and are located in the skin. They are involved in providing protection to the body. Hair follicles contain stem cells that regenerate hair, while the epidermal layer forms a barrier against pathogens and UV radiation.
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What is the name given to the pocket of epidermal and dermal cells that the hair grows within?
That would be the follicle. The hair follicle is a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with hair follicles.A mature hair follicle contains a bulb holding the dermal papilla cells, a hair shaft extending from the bulb through to the outer exterior of the epidermis, and a dermal sheath which provides an external covering of tissue around the bulb and along the length of the follicle.The hair follicle extends through the dermis, a hypodermis (a loose layer of connective tissue below the dermis), and a fat (or adipose) layer. In adults, molecular signals between the dermal papilla and the epidermal component of a follicle cause the hair to enter an active growth phase from an inactive phase.
What are the three layers of the inner root sheath?
The cuticle, Huxley's layer, and Henle's layer are the three layers of the inner root sheath of a hair follicle. The inner root sheath surrounds the hair shaft and helps protect it as it grows.
Does the hair bulb produce hair?
Only the cells of the hair bulb are alive to understand this more here is how the hair bulb if formed. Hair follicles forms a cluster of cells in the upper layer of the skin. These cluster of cells are called the primitive hair germ, which needs nourishment to grow into a developed hair follicle. To get nourishment it works all the way down into the lower layer of the skin. As it does, the cell cluster pulls the upper layer down with it creating a follicle called the root Sheath, out of which the hair will grow. The shape of this follicle then determines the shape of the hair shaft as it grows from the follicle.
What tissue gives rise to a plant root's hair and a human root hair?
In plants, root hairs originate from the epidermal cells of the root tissue, specifically from specialized root epidermal cells called trichoblasts. In humans, hair follicles in the skin produce root hairs, which are composed of keratinized cells that grow from the hair follicle.
The sac from which hair grows?
Hair follicle.
