A digital atlas of every cell in a developing marine worm reveals how networks across the body coordinate sensing and movement, and provides insights into the evolution of the nervous system.

Sympathetic nervous system: Carries out your body’s “fight or flight” functions Parasympathetic nervous system: Carries out your body’s “rest and digest” functions ...

Because C. elegans is so tiny -- adults are just one millimeter long and have only about 1,000 cells -- its simple nervous system of a few hundred neurons (302 in the hermaphrodite/female sex, 385 ...

The central nervous system consists of the brain and spinal cord. The central nervous system controls thought, movement, and emotion, as well as breathing, heart rate, hormones, and body temperature.