The brain and central control in the earthworm.
D000818:Animals; D001921:Brain / Q000502:physiology*; D002940:Circadian Rhythm; D005724:Ganglia / Q000502:physiology; D006234:Handling, Psychological; D008027:Light; D008124:Locomotion; D009043:Motor Activity / Q000502:physiology*; D009835:Oligochaeta / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology