BIOL 200 Lecture Notes - Anemia, Tunica Intima, Basophil
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19 Jan 2013
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Connective tissue (ct) binds to and supports body parts. Muscle tissue protects joints, produces movement and heat. Nervous tissue responds to stimuli and transmits impulses from one body part to another. Epithelial tissue covers body surfaces and lines body cavities. Skin is an organ: epidermis of skin is made of stratified squamous epithelium, new cells are pushed outward, become keratinized, die and are rubbed off. Simple epithelium: composed of a single cell layer: found in the alveolar (air sacs) wall of the lung. Increases rate of diffusion by increasing surface area and reducing diffusion pathway. Stratified epithelium: composed of multiple cell layers: provide protection. Squamous: cells have a flattened appearance, with a flattened nucleus. Cuboidal: cells appear as a cube, the nucleus is spherical. Columnar: cells are column shaped with an elongated nucleus. Cilia: small projections that can move small substances: lines the respiratory tract, cleans impurities by moving them upwards, towards the throat.
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tissue organ atom |
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heats has no effect on dries the body |
terminal hair rrrector pili arrector pili |
periostesis mastication cartilage |
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small sacs containingsynovial fluid semilunar cartilagepads tendon sheaths |
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