Thes a network of nerves and cells working to carry messages to and from the brain and spinal cord to various parts of the body FUN FACTThe number of stars in the Milky Way is less thanthe number of n ID: 888705
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1 The nervous system i s a network of ne
The nervous system i s a network of nerves and cells, working to carry messages to and from the brain and spinal cord to various parts of the body. FUN FACT : The number of stars in the Milky Way is less than the number of nerve cells in the human brain. • The nervous system is divided into two parts: th e central nervous system (CNS) and the peripheral nervous system (PNS) o The CNS is made up of the brain and spinal cord ▪ The 3 parts of the brain: the forebrain, midbrain, and hindbrain all have specific functions o The PNS consists of the nerves extending fro m the spinal cord that go throughout the entire body • The PNS is divided into two divisions: the somatic and autonomic nervous system o The somatic nervous system consists of voluntary movement (ex. twisting a doorknob with your hand) o The autonomic nervous system consists of involuntary body actions (ex. digestive organs breaking down food, beating of the heart, etc.) • The neurons are the basis of the nervous system. Different neurons have different jobs: o Motor neurons carry messages away from the brain to the rest of the body to produce movement o Sensory neurons carry messages from the body back to brain with information about the outside environment • Dead heart cells can never recover, so eat well and exercise to take care of your heart! Sources: https://kidshealth.org/en/parents/brain - nervous - system.html Written by Shreya Ohri