ANT 318L Chapter Notes - Chapter 5: Tubular Gland, Eccrine Sweat Gland, Arrector Pili Muscle
Document Summary
Atoms molecules cells tissues organs organ system organism. Reticular layer: deeper layer of the dermis, made of dense irregular connective tissue, extracellular collagen fibers provide most of skin"s flexibility, flexure lines allow for joint movement by creating folds, skin isn"t stretchable enough. Skin appendages: most structures of the integumentary system are located in the dermal layer and extend into the epidermal layer, specialized structures are derived from epidermal layer during development, includes hair, nails, and skin glands. Nails: hard keratinized superficial covering of the distal part of the fingers and toes, provides edges that allow for more precise manipulation of objects, nail grows from the nail matrix located deep to the overlapping epidermis. Skin related medical conditions: skin conditions generally fall into two categories, cancers, loss of epidermal integrity. Cancer: skin cancer is predominantly caused by uv radiation, metastasis (spread of cancer) is major cause of death in skin cancer cases, skin cancer is not usually in itself deadly.
