(a) What is the function of our nervous system?
(b) What are the main organs of the human nervous system? Draw a labelled diagram to show the main organs of the human nervous system.
(c) How does the human nervous system work? Explain.
(a) The function of the nervous system is to coordinate the activities of our body. The nervous system helps all the other systems of our body to work together.
(b) The main organs of the human nervous system are the brain, the spinal cord and the nerves.
Human nervous system:
(c) When the sense organs such as eyes, ears, nose, tongue or skin are affected in our body, they send the message to the brain in the form of electrical impulses through the sensory neurons. The brain analyses this message and decides the action to be taken. The brain, then, sends out instructions to the muscles of the concerned body part through the motor neurons. The concerned body part, then, acts according to the instructions sent by the brain.