The Human Nervous System
Three systems · One brain · Billions of neurons
Recognise the three divisions of the nervous system
Name the three parts of the brain and their work
Explain how a reflex action happens
Tell the sympathetic and parasympathetic systems apart
Central: the brain and spinal cord, the body's main control
Peripheral: nerve fibres carrying messages between centre and body
Autonomic: the involuntary work of the heart, lungs and organs
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