NURS 202 Lecture Notes - Lecture 7: Lyme Disease, Hives, Sexual Stimulation
Document Summary
Skin, hair, nail assessment (lecture + chapter 13). Skin: two layers: outer epidermis (cells bound tight together forming barrier, stratified into different zones- inner stratum germinativum/basal cell layer forms new skin cell. Main content is keratin, with some melanocytes producing melanin. People have same number of melanocytes, but amount of melanin varies with gene, hormone, environ. - from basal layer, new cells move up and flatten into stratum corneum: outer layer= dead keratinized cell packed. Constantly shed/desquamated, replaced with new cells from below. -epidermis uniformly thin except high friction surface: palm and soles; avascular (nourished by vessel in dermis from below); skin color: brown melanin, yellow-orange carotene, red-purple vascular bed. So all people vary in shades of brown, yellow, red. Also modified by thickness of skin and presence of edema: base supporting dermis. Also has resilient elastic tissue that let skin stretch. Dermis also have nerves, sensory receptors, blood vessels, lymphatic vessels.
