9 Epidermal characteristics: Cells accumulate keratin and eventually are shedEpidermal ridges are interlocked with dermal papillaeFingerprintsImprove gripping abilityLangerhans cells (immunity) in s. spinosumMerkel cells (sensitivity) in s. germinativum
18 Dermal Circulation and innervation Cutaneous plexus arteries found in subcutaneous layer/papillary dermisCutaneous sensory receptors (light touch, pressure)
19 HypodermisStabilizes skins position against underlying organs and tissues
20 Hairs Originate in hair follicle Composed of root and shaft Root base (hair papilla) surrounded by hair bulb and root hair plexusHairs have soft medulla and hard cortexCuticle = superficial dead protective layer
35 You should now be familiar with: The components of the integumentary system, including their physical relationships.The functions of the integumentary system.The main features and functions of the epidermis and dermis.Individual and racial differences in skin.The effects of UV light on the epidermis.The structure and function of the various accessory organs of the skin.How the skin responds to repair.