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Unformatted text preview: 1-18-08 anatomy notes1.Organ Systems2.Nervous Systema.Neuroglial Cells (found in CNS and PNS)i.Schwann cells (PNS only)-produce myelinated axons (mostly) and myelinated dendritesii.Oligodendricytes (CNS only, are largely in the brain)-produce myelinated axons and myelinated dendrites from late fetus through 2ndyear1.Multiple sclerosis-a de-myelinating disease (breakdown of myelin sheath and nerves)a.Occurs in specific regions of bodyi.Small of backii.Armsiii.Brainb.Debilitating; victims sometimes lose mobilityc.Still have all mental facultiesiii.Microgliocytes-are macrophage-like cells found only in the CNS1.Move about in nervous tissue2.Phagocytosis destroy bacteriaa.Stroke-burst blood vesseli.Accumulates at site of strokeiv.Astrocytes-found only in CNS1.Supporta.Connect blood capillaries to neurons2.Associate w/blood-brain barrier (BBB)a.Established by morphology (structure) of brain capillaries (tight junctions of endothelial cells of capillaries)i.Keeps large molecules from entering nerve tissue...
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