dermal papilla: (plural = dermal papillae) extension of the papillary layer of the dermis that increases surface contact between the epidermis and dermis dermis: layer of skin between the epidermis and hypodermis, composed mainly of connective tissue and containing blood vessels, hair follicles, sweat glands, and other structures The projections of the dermis are called dermal papillae and those of the epidermis, epidermal ridges (pegs), because of their appearance in vertical sections of the skin. Fibroblast 3. Keratin 15. Adipose tissue 7. However, these terms are not always accurately descriptive of the three dimensional configuration of the region of interdigitation. Melanocyte 4. Medical definition of papillary layer: the superficial layer of the dermis raised into papillae that fit into corresponding depressions on the inner surface of the epidermis. The dermal papilla is responsible for regulating the hair cycle and hair growth and is also comprised of androgen … The distinctive sheath of modified Schwann cells surrounds one or two nerve fibers poised to detect fine touch of the overlying epidermis. DP is a group of specialized dermal fibroblast cells. Angiogenesis 2. Description. They are derived from the embryonic mesoderm They aggregate in the dermis just below the epidermis. Anatomy and Physiology. Tiny smooth involuntary muscle, attached to hair follicle and dermal papillae and cotracts when cold or frightened and produces goosebumps Sebaceous Gland a cutaneous gland that secretes sebum (usually into a hair follicle) for lubricating hair and skin The establishment of a dermal papilla (DP) is vital to the development of all hair follicles. Anatomy of Hair Parts of the Hair. Langerhans cells 16. study of the structure, function, and disorders of the integumentary system: Term. Total Cards. The hair follicle is an organ found in mammalian skin. Dermal papillae 10. NAME:_____ DATE:_____ Anatomy & Physiology Mr. Mucous membrane 5. Areolar connective tissue 8. Dermal Papillae. Hypodermis 14. Chapter 5- Integumentary System. Term. Epidermis: Definition. 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. Dermatology: Definition. Capillaries 9. A high power view of the dermo-epidermal junction shows the characteristic architecture of a Meissner's corpuscle occupying a portion of a dermal papilla. Dermis 11. Desquamation 12. Epidermis 13. n. 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