Hair (with arrector pili muscle). This new molecular histology of skin appendages is the foundation for forming new hypotheses on how molecules are mechanistically involved in skin appendage development and for designing experiments to test them. Most of the skin is haired although the hair in most areas is short, fine and only lightly pigmented. Thickness of epidermis. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Skin appendages are epidermal & dermal derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. 1 This maturation process is further outlined in Table 5-1. A maturing scar, however, does not fully recover its preinjury histology. The skin appendages are epidermal and dermal derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. Structure of the skin Skin & Appendages Dr. Shahbaz Ahmad PT DPT[UIPT][UOL] MS-MSK-PT [UIPT][UOL]* Lecturer [LIHS][LCPS] 2. A comprehensive, fun and entertaining site devoted exclusively to histology. 42-43 in Histology for Pathologists, Sternberg, 1998; newer edition: Mills, Histology for Pathologists, 3rd ed., 2007). This site includes histology quizzes, histology games, slides, mnemonics, histology puzzles and tons of information about histology. Wheater’s Functional Histology Layers of Skin 1) Epidermis stratified squamous epithelium epidermal ridges 2) Dermis a) papillary layer small blood vessels, lymph & nerves fine collagen & elastic fibers b) reticular layer vascular plexus, lymph, nerves & appendages compact collagen fibers & thick elastic fibers 3) Hypodermis (subcutaneous) Skin varies markedly over different parts of the body. A characteristic feature of the human skin is the apparent lack of hair (pili) on most of the body surface. This is actually not quite true. Start studying Histology Lippincott Chapter 8 (Skin and Epidermal Appendages). This may also lead to the modulation of healing and regeneration processes in future treatment modalities. Learning histology was never so easy! Nails. The skin appendages are epidermal and dermal derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. The skin is the largest single organ of the body, typically accounting for 15%-20% of total body weight and, in adults, presenting 1.5-2 m 2 of surface to the external environment. One of the best histology sites on the internet! Each component has a unique structure, function, and histology. Each component has a unique structure, function, and histology. Consult a textbook for illustrations (e.g., pp. This type of hair is called vellus hair. -General functions of the integumentary system are: Protection from mechanical injury. All of the components of skin contribute to this variation. 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