The human nervous system diagram, also known as the neural system, is a complex network of neurons designed to carry messages. As we progress to higher animals, the nervous system becomes more complicated. Cnidarians, such as jellyfish, have relatively simple nerve nets that run throughout their bodies. Crabs have a more complex nervous system comprised of two nerve centers, the dorsal and the ventral ganglion. The human nervous system diagram in the human body integrates the activities of organs based on the stimuli that neurons detect and transmit. They send and receive messages from electrical impulses from and from the sense organs. Thus, nervous coordination involves sense organs, nerves, the spinal cord, and the brain.
