Lab+9+-+CNS

Lab+9+-+CNS - Central Nervous System Four Basic Tissue...

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Unformatted text preview: Central Nervous System Four Basic Tissue Types • Epithelial Tissue • Connective Tissue • Muscle Tissue • Nervous Tissue 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 Neuron Neuron Nucleus Nucleolus Body Axon hillock Axon 4 types of glial cells in CNS- macrophages line ventricles myelinate CNS fibers several functions CNS = Brain and Spinal Cord 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 Brain: 4 Major Parts Brain Developmental Organization Ventricles Prosencephalon: Telencephalon: Cerebrum Lobes of the Cerebrum Major external structures Major Internal Structures 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. More pyramidal cells Limbic System...
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This note was uploaded on 12/02/2009 for the course IB 131L taught by Professor Lewis during the Spring '09 term at Berkeley.

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Lab+9+-+CNS - Central Nervous System Four Basic Tissue...

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