G4 Science Vocabulary

part of the nervous system made up of the brain and spinal cord

organ in the nervous system that interpret messages received from and sends messages to other body organs

the process of finding an object by using reflected sound

organs such as the skin, eyes, ears, nose, and tongue that gather information from outside the body

a thick bundle of nerves inside the spine

a reaction to a stimulus

they send electrical signals to and from the brain

a nerve that is not part of the central nervous system and receives sensory information from cells in the body

a quick reaction that occurs without waiting for a message to be sent from nerves to the brain

the process of recognizing and interpreting a stimulus