This program concentrates on the nervous and endocrine systems. A soccer match offers an opportunity to investigate how neurons work and how a simple reflex arc functions. Footage of infants illustrates the processes of neural network growth and coordination acquisition. A Penfield map opens the door to a study of the senses, with an emphasis on vision. The links between chemical activity in the brain and behavior are examined. And an analysis of bungee jumping indicates how the endocrine and nervous systems work together to control actions and moods. The effects of drugs and other psychoactive substances on these sensory systems are also considered. Contains nudity associated with childbirth. (20 minutes)