The Nervous System
- Created by: __Jess
- Created on: 30-06-22 18:04
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- The Nervous System
- The Central Nervous System
- Made up of the brain and the spinal cord
- The brain is the centre of all conscious awareness
- The outer layer (cerebral cortex) is 3mm thick and is only found in mammals.
- The brain is divided into two hemispheres
- The spinal cord is an extension of the brain.
- It passes messages to and from the brain and connects nerves to the PNS. It's responsible for reflexive actions.
- The brain is the centre of all conscious awareness
- Made up of the brain and the spinal cord
- The Peripheral Nervous System
- Transmits messages, via millions of neurons, to and from the CNS.
- Autonomic Nervous System
- Governs vital functions in the body such as breathing, heart rate, digestion and stress responses.
- Somatic Nervous System
- Governs muscle movement and receives information from sensory receptors.
- Two main functions of the NS
- To collect, process and respond to information in the environment.
- To co-ordinate the working of different organs and cells in the body.
- Communicates using electrical and chemical signals.
- The Central Nervous System
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