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==Introduction==

==Introduction==

The '''Peripheral Nervous System''' is made up of cranial and spinal nerves. Spinal nerves are named after the vertebra immediately above it, except for '''cervical vertebra'''. There are '''7''' cervical vertebrae and '''8''' cervical spinal nerves. The peripheral nervous system can be divided into the '''somatic nervous system''' and '''autonomic nervous system'''. The somatic nervous system co-ordinates body movements and also receives external stimuli. It basically regulates activities that are under conscious control. The autonomic nervous system is then split into the '''sympathetic nervous system''', '''parasympathetic nervous system''', and enteric division. The sympathetic nervous system is the '''‘fight or flight’''' system which comes into role when an animal is under threat, its main neurotransmitter is adrenaline. The parasympathetic nervous system is the '''‘rest and digest’''' system which is responsible for digestion. Its main neurotransmitter is '''acetylcholine'''.

The '''Peripheral Nervous System''' is made up of cranial and spinal nerves. Spinal nerves are named after the vertebra immediately above it, except for '''cervical vertebra'''. There are '''7''' cervical vertebrae and '''8''' cervical spinal nerves. The peripheral nervous system can be divided into the '''somatic nervous system''' and '''autonomic nervous system'''. The somatic nervous system co-ordinates body movements and also receives external stimuli. It basically regulates activities that are under conscious control. The autonomic nervous system is then split into the '''sympathetic nervous system''', '''parasympathetic nervous system''', and enteric division. The sympathetic nervous system is the '''‘fight or flight’''' system which comes into role when an animal is under threat, its main neurotransmitter is '''adrenaline'''. The parasympathetic nervous system is the '''‘rest and digest’''' system which is responsible for digestion. Its main neurotransmitter is '''acetylcholine'''.

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