1. Central Nervous System (CNS)
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2. The Central Nervous System (CNS)
Main functions of the CNS:
conveys messages between brain and spinal cord;
processes info, problem solving
2 structures make-up the CNS:
brain;
spinal cord
the skull and vertebrae protect these
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3. The Central Nervous System (CNS) cont.
The job for these 2 structures is to respond to the environment
The structures are wrapped in meninges (connective tissue) & it consists of 3 layers (protection)
Cerebral spinal fluid (CSF):
bathes brain and spinal cord
shock absorber that protects CNS
allows for exchange of nutrients and waste products between blood and nervous tissue
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4. Peripheral Nervous System (PNS)
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5. Peripheral Nervous System
Function: receives info. from the environment and relays commands from the CNS to organs and glands
It lies OUTSIDE the CNS
Includes all nerves and associated cells that are not part of the brain and spinal cord
*divided into sensory & motor divisions
Sensory: transmits impulses from sense organs to the CNS
Motor: transmits impulses from the CNS to muscles or glands
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