13. ♥The nervous system consists of the brain, the spinal cord and the nerves. ♥The brain and the spinal cord form the central nervous system. ♥The nerves which send nerves impulses from the sensory organs or receptors to the brain are called the sensory nerves. ♥The nerves which carry nervous impulses from the central nervous system to the muscles or glands for carrying out the responses are called the motor nerves.
17. THE SKIN ♥The skin is made up of two layers: -the epidermis -the dermis ♥The skin is a sense organ helping the body to know what is happening in its surroundings. ♥The nerve endings or receptors in the skin detects stimuli