Cell Tissues
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NERVE CELLS | NEURONS
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Body of neuron | SOMA
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Carry info to soma | DENDRITES
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Send info from soma | AXON
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place where 2 neurons meet | SYNAPSE
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STEM CELLS | unspecialized, undifferentiated cells; great potential for regeneration
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Differentiate | to become more specialized
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HUMAN EMBRYONIC STEM CELLS | cells of developing embryos; differentiate into embryonic tissues
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4 Primary Tissue Types | Epithelial, Connective, Muscular, Nervous
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covers or lines parts of body e.g. outside skin or lining of digestive tract | Epithelial Tissue
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how epithelial layers adheres to underlying layers | Basement Membrane
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connects most superficial layer (Epidermis) to underlying DERMIS | Basement Membrane of Epidermis
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How is Epithelial Tissue Classified | Shape of Cells @ Free Surface; # of Layers Present
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CELL SHAPES | SQUAMOUS, CUBOIDAL, COLUMNAR
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CELL LAYERS | SIMPLE, STRATIFIED, PSEUDOSTRATIFIED
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FLATTENED CELL | SQUAMOUS
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SINGLE LAYER CELL | SIMPLE
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Cells Stacked in More Than One Layer | STRATIFIED
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Cells in 1 Layers (appears to be many layers) | PSEUDOSTRATIFIED
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cells are held together @specific regions | DESMOSOMES
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hold cells even more closely together | TIGHT JUNCTIONS
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connect 1 cell to another; allows ions & other solutes to pass from one cell to another; | GAP JUNCTIONS
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What do Gap Junctions allow? | COMMUNICATION
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MUSCLE TISSUE | cells contract & shorten in length
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cells of skeletal muscle | FIBERS
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STRIATED, VOLUNTARY | SKELETAL MUSCLE
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STRIATED, BRANCHED, INVOLUNTARY, INTERCALATED | CARDIAC MUSCLE
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NONSTRIATED, INVOLUNTARY | SMOOTH MUSCLE
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NERVOUS TISSUE | Tissue of brain, spinal cord, ganglia, & peripheral nerves
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Conductive Cells of Nervous Tissue | NEURONS
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NEURONS | receive & transmit electrochem impulses
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