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chapter 4
Nervous Tissue
| Term | Definition |
|---|---|
| Nervous tissue | is found in the brain and spinal cord |
| Neurons | Nervous Tissue cells Generate and conduct nerve signals |
| Neuroglia | Nervous system supporting cells |
| Dendrite | A part of the neuron Receives signals |
| Cell Body | A part of the Neuron Contains the nucleus |
| Axon | A part of the Neuron Conducts nerve impulses |
| Tracts | A part of the Axons nerve fiber In the brain and spinal cord |
| Nerves | A part of the Axons nerve fiber All parts of the body EXCEPT the brain and spinal cord |
| Nerve Fibers | Long Axons |
| Neuroglia | are nervous tissue cells that are more numerous than neurons |
| Neuroglia | Nourish and support neurons, but do not conduct an impulse |
| Microglia | neuroglia found in the brain engulf bacteria and cellular debris |
| Astrocytes | neuroglia found in the brain provide nutrients to neurons |
| Oligodendrocytes | neuroglia found in the brain form myelin, a protective fatty layer |
| myelin | A form of Oligodendrocytes |
| Ependymal cells | neuroglia found in the brain line the ventricles, cavities in the brain |
| Schwann cells | are neuroglia located outside the brain or spinal cord |
| Myelin sheath | Produced by Schwann cells Outside of the brain and spinal cord |
| Myelin sheath | Cover nerve fibers Speeds electrical Signals |
| Nodes of Ranvier | Gaps between Myelin Sheath neurons |
Created by:
JamieS1982