Dermal Papillae. DP is a group of specialized dermal fibroblast cells. Areolar connective tissue 8. 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. 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 Desquamation 12. Backer Chapter 4: The Skin and Its Parts 1. However, these terms are not always accurately descriptive of the three dimensional configuration of the region of interdigitation. Epidermis: Definition. Chapter 5- Integumentary System. The dermis consists of two layers: The papillary layer is a thin outer layer of areolar connective tissue with fingerlike projections called dermal papillae that protrude into the epidermis.In the hands and feet, the dermal papillae generate epidermal ridges (sweat from the epidermal ridges leaves fingerprints). Total Cards. They are derived from the embryonic mesoderm They aggregate in the dermis just below the epidermis. NAME:_____ DATE:_____ Anatomy & Physiology Mr. Capillaries 9. Mucous membrane 5. Dermal papillae 10. 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. The hair follicle is an organ found in mammalian skin. 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. 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 Dermatology: Definition. Anatomy and Physiology. Pigmentation 6. Hypodermis 14. Fibroblast 3. Melanocyte 4. Description. Adipose tissue 7. Epidermis 13. n. Any of the superficial projections of the corium or dermis that interlock with recesses in the overlying epidermis, contain vascular loops and specialized nerve endings, and are arranged in ridgelike lines most prominent in the hand and foot.papilla of corium Term. 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