brain science definition

1. The part of the nervous system in vertebrates that is enclosed within the skull, is connected with the spinal cord, and is composed of gray matter and white matter. It is the control center of the central nervous system, receiving sensory impulses from the rest of the body and transmitting motor impulses for the regulation of voluntary movement. The brain also contains the centers of consciousness, thought, language, memory, and emotion. See more at brainstem, cerebellum, cerebrum.
2. A bundle of nerves in many invertebrate animals that is similar to the vertebrate brain in function and position.

brain

A. skull, B. cerebrum, C. pituitary gland, D. pons, E. thalamus, F. cerebellum, G. medulla oblongata, H. spinal cord