Most of the skin is haired although the hair in most areas is short, fine and only lightly pigmented. Appendages of the Skin Hair. This is actually not quite true. 1 This maturation process is further outlined in Table 5-1. Skin varies markedly over different parts of the body. Thickness of epidermis. Skin appendages are derived from the skin and include hair, nails, and glands. Hair (with arrector pili muscle). 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. skin and appendages Histology 1. A maturing scar, however, does not fully recover its preinjury histology. Start studying Histology Lippincott Chapter 8 (Skin and Epidermal Appendages). One of the best histology sites on the internet! Learning histology was never so easy! A comprehensive, fun and entertaining site devoted exclusively to histology. This type of hair is called vellus hair. Each component has a unique structure, function, and histology. The skin appendages are epidermal and dermal derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. Consult a textbook for illustrations (e.g., pp. The main functions of the skin are protection (barrier against ultraviolet radiation, microorganisms, and water loss), the synthesis of vitamin D, detection of sensation (e.g., touch, temperature, pain), and the regulation of body temperature. 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) All of the components of skin contribute to this variation. This may also lead to the modulation of healing and regeneration processes in future treatment modalities. -General functions of the integumentary system are: Protection from mechanical injury. There is complete loss of skin appendages, incomplete reformation of the rete ridges and papillary dermis, as well as alterations in the collagen fiber bundles. Skin appendages are epidermal & dermal derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. A characteristic feature of the human skin is the apparent lack of hair (pili) on most of the body surface. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Each component has a unique structure, function, and histology. This site includes histology quizzes, histology games, slides, mnemonics, histology puzzles and tons of information about histology. 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