Vr66 Anatomy & Physiology of Hair & Skin Essay

3045 WordsDec 18, 201313 Pages
VR66 - ANATOMY & PHYSIOLOGY OF SKIN AND HAIR 1. Draw and label a diagram of the Epidermis. 2. Draw and label a diagram of the dermal and subcutaneous layer Of the skin Please make sure that you include all the things from the table below. 3. Fill in the following table: STRUCTURE POSITION FUNCTION Papillary layer Upper layer of dermis Provides nutrients for the living cells of epidermis Reticular layer Second layer of dermis Collagen, elastic & reticular fibbers gives skin strength elasticity and support which all help to maintain skin’s tone. Subcutaneous layer Situated below the dermis, consists of Adipose tissue(fat) and areola tissue Adipose tissue protects against injury and insulates keeping body warm. Areola tissue elastic fibbers making layer strong and flexible Eccrine glands Coiled tubular glands open directly onto skins surface Regulate body temperature, help eliminate waste Apocrine glands Connected to hair follicles, only found in genital and underarm regions Produce a fatty secretion. Breakdown of secretion by bacteria and leads to body odour Hair follicles Sac or sheath of epidermal cells and connective tissue, surrounds root of hair Holds hair in place and enclose the hair shaft, provides hair with vital nourishment – contains dermal papilla which supplies blood to hair Sebaceous glands Small sac-like pouches Produce an oily substance known as Sebum (contains fat, cholesterol and cellular debris) coats surface of skin and hair shaft preventing excess water loss Arrector pili Smooth muscle of sensory fibbers attached at angle to base of hair follicle Makes hair stand erect in response to cold or experiencing emotions as fright and anxiety Blood vessels Runs through dermis and subcutaneous layers Brings nutrients and oxygen to germinating cells in the epidermis and

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