Lab+9+-+CNS - C ntral Ne e rvous S m yste Four Basic Tissue...

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Central Nervous System
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Four Basic Tissue Types Epithelial Tissue Connective Tissue Muscle Tissue Nervous Tissue
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There are two types of nerve cells Neurons process and transmit information electrically excitable Glial cells (a/k/a neuroglia) provide support, protection, and nutrition to neurons
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Neuron
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Neuron Nucleus Nucleolus Body Axon hillock Axon
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4 types of glial cells in CNS - macrophages line ventricles myelinate CNS fibers several functions
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CNS = Brain and Spinal Cord
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Grey Matter and White Matter Throughout the CNS we see: grey matter nerve cell bodies (neurons and glial cells) capillaries some very short axons and dendrites white matter composed only of myelinated axons
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Brain: 4 Major Parts
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Brain Developmental Organization
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Ventricles
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Prosencephalon: Telencephalon: Cerebrum
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Lobes of the Cerebrum
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Major external structures
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Major Internal Structures
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Cerebral Cortex: Pyramidal Cells dendrites Note pyramidal (triangle) cell bodies, and long dendrites. Axons very thin and hard to see – they lack the “fuzzy” edges of the dendrites.
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More pyramidal cells
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