| A | B |
|---|
| Serous membranes | Line cavities that do not open to outside |
| Mucous membranes | Line cavities & tubes that open to outside - ex. oral cavity, digestive system |
| Cutaneous membrane | Main organ of the integumentary system - aka Skin |
| Synovial membranes | Line joint cavities between bones of freely movable joints |
| Epidermis | Top layer of skin, stratified squamous epithelium |
| Stratum basale | deepest layer of epidermis; cells nourished by blood vessels of the dermis; cells divide |
| Stratum corneum | Outermost layer of the epidermis; dead, keratinized cells that are often rubbed away |
| Keratinization | cytoplasm develops strands of tough, fibrous, waterproof protein (keratin) |
| Melanin | Pigment that absorbs light energy providing protection from harmful uv radiation |
| Dermis | Thicker layer of skin; composed of fibrous connective tissue, epithelial tissue, smooth muscle tissue, nervous tissue & blood |
| Subcutaneous layer | Located beneath the dermis; loose connective & adipose tissue; binds skin to underlying organs |
| Sebaceous gland | Holocrine gland usually associated with a hair follicle; produces sebum |
| Apocrine gland | Sweat gland ususlly associated with a hair follicle; respond to emotional stress; most numerous in armpit & groin |
| Eccrine gland | Sweat gland not associated with hair follicles; respond to elevated body temperatures; common on forehead, neck & back |
