Bsc 109 1nd Edition Lecture 7 Outline of Last Lecture I. Fat and glycogen: sources of energyII. The cytoskeleton supports the cellIII. Cilia and flagella are specialized for movementIV. Cells use and transform matter and energyV. Glucose provides cells with energyVI. Anaerobic pathways make energy without oxygenChapter 4I. Tissues: group of cells with common function, organ systems have all 4II. Epithelial tissuesIII. Cell junctions hold cells togetherIV. Connective tissueV. Muscle tissue contracts to produce movementVI. Nervous tissues transmit impulsesVII. Organs and organ systems perform complex functionsVIII. Body cavities/planes/positionsIX. The skin as an organ systemOutline of Current Lecture I. The skin as an organ system (continued)II. Skim disorders and diseasesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Current LectureI. the skin as an organ systemE. Dermis1. Beneath the epidermis2. Supports tissues3. Fibersa) Collagenb) Elastic4. Cellsa) Fibroblastsb) Mast cellsc) White blood cellsd) Fat cells (insulation and cushionin)5. Structuresa) Hair: shaft, follicleb) Smooth muscle: attached to hair follicle, raises hair to upright positionc) Oil glands: secrete oil to moisten and soften hair and skin, cracks and breaks when dryd) Sweat glands: secrete sweat, help in temp. regulatione) Blood vessels: supply nutrients, remove waste, assist in temperature regulationf) Sensory nerves: detect heat, cold, touch, deep pressure, vibrationII. Skin disorders/ diseasesA. Acne: pores blocked by oil, bacteria, or dirt become infectedB. Cancer: uncontrolled growth of skin cells; ABCDE: asymmetry, border, color, diameter, evolvingC. Hemangioma: abnormal buildup of blood vessels D. Psoriasis: chronic skin condition marked by red and sometimes scaly and sometimes scaly patches of skinE. Hives: raised often itchy, red welts on the surface of the skin; usually due to allergic reactions to food or medicineF. Molluscum contagiosum: viral skin infection that causes raised, pearl-like noduleson the skinG. Necrotizing fasciitis: bacterial infection that destroys skin, muscles, and underlying tissueH. Shingle/ chickenpox: blistering rash caused by a herpes virus varicella
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