Term
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Definition
| Central Nervous System. Consists of the Brain (about 100 bil neurons) and the Spinal Cord (about 100 mil neurons) which ends around your 1st lumbar vertebra. |
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Term
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Definition
| Peripheral Nervous System. 12 Pairs of cranial nerves. 31 pairs of spinal nerves: 8 cervical (7 cervical vertebra), 12 thoracic nerves (12 thoracic vertebra), 5 lumbar nerves (5 lumbar vertebra), 5 sacral nerves (1 Sacrum), 1 coccygeal nerve (2-4 coccygeal vertebra) |
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Term
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Definition
| Nerve cell. 3 types: Multi-polar (most common), Unipolar (sensory, goes from PNS to CNS only), Bipolar (only found in eye, inner ear). |
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Term
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Definition
| Collection of axons or nerve fibers. Only found in the PNS. |
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