They are under the control by the autonomic nervous system. <- ANSWER
The autonomic nervous system is responsible for the body functions such as heartbeat, breathing, digestion, sweating, and sexual arousal.
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.
