Parts of the Nervous System (Leaving Cert Biology): Flashcards
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Two main divisions of the nervous system
Two main divisions of the nervous system
Central nervous system (CNS) and peripheral nervous system (PNS)
What does CNS stand for?
What does CNS stand for?
Central nervous system
What does PNS stand for?
What does PNS stand for?
Peripheral nervous system
Two components of the CNS
Two components of the CNS
Brain and spinal cord
Role of the brain in the CNS
Role of the brain in the CNS
Master control centre; makes decisions and processes information
Function of the spinal cord
Function of the spinal cord
Carries messages between brain and body via neurons
Four main functions of the CNS
Four main functions of the CNS
Receives info, processes it, makes decisions, sends commands
What the PNS connects
What the PNS connects
CNS to all organs, muscles, and sensory receptors
Three components of the PNS
Three components of the PNS
Nerve fibres, cell bodies (ganglia), and bundles of nerves
Location of PNS tissue
Location of PNS tissue
All nervous tissue outside the brain and spinal cord
Two types of messages the PNS carries
Two types of messages the PNS carries
Sensory information (to CNS) and motor commands (from CNS)
What are ganglia?
What are ganglia?
Clusters of nerve cell bodies outside the CNS