Text: The Skin (Integumentary System) 6 Basic Structure of the Skin 1. Complete the following statements by writing the appropriate word or phrase in the correspondingly numbered blank. The two basic tissues of which the skin is composed are dense connective tissue, which makes up the dermis, and which forms the epidermis. Most cells of the epidermis are keratinocytes. The protein keratin makes the dermis tough and leathery. The specialized cells that produce the pigments that contribute to skin color are called melanocytes. 2. Four protective functions of the skin are: - Stratum basale: the layer containing cells that undergo mitosis - Stratum lucidum: the more superficial epidermal layer - Reticular layer: the layer containing sacs filled with fatty material - Stratum corneum: the most superficial epidermal layer - Epidermis (as a whole): accounts for most of the epidermis - Papillary layer: the region where melanocytes are most likely to be found - Dermis (as a whole): has abundant elastic and collagen fibers - Subcutaneous region: the major skin area where derivatives (nails and hair) reside - Stratum granulosum: the layer containing keratin subunits - Stratum spinosum: the region exhibiting the most mitoses - Avascular region: the more superficial dermal layer Note: The square root symbol was not mentioned in the provided text.

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