Term | Definition |
Tissue | Group of cells which preform a specific function. |
Epithelia functions | Protection (skin), Absorption (intestines), Secretion (glands), Excretion (kidneys). Also makes tubes in the body, the tubes are wrapped epithelial tissue. |
4 basic types of tissues | Epithelium (cellular sheets), connective (fibrous, supportive), muscle (contractile proteins), neural (electrically conductive). |
Epithelial tissues have 5 main functions | Cellular, polarity, basement membranes (including basal lamina), avascular, regeneration. |
Epidermis | Outer skin, above dermis. Has many layers of epithelium sheets, can regenerate. Doesn't bleed unless dermis is cut. Nutrients enter under basement membrane. |
Dermis | Tough leather like layer, largest layer, carries lots of veins and arteries. |
Hypodermis (subcutaneous layer) | "Hypodermic needles" - must go deep to that layer of the integumentary system. Fat in hypodermis. |
Mucous membrane | Thin, makes mucus. Found around nose/ in nose, vagina, penis, rectum and eyes. Exposed to external environment. KEEPS MOISTURE. |
Serous membrane | Covers organs/ lines body cavities making lubricant to aid organs as they move. Extremely thin (ex: pleural, pericardial and peritoneal cavities). |
Synovial fluid | Lines joint cavities - provides for exchange of fluids/ solutes between the joint cavity and the adjacent tissues. |
Cutaneous "membrane" (skin) | Covers the body. It is thick, relatively waterproof, abrasion resistant. |