Final answer:
The autonomic and somatic nervous systems are the two main subdivisions of the peripheral nervous system (PNS). The somatic nervous system controls voluntary actions, while the autonomic nervous system regulates involuntary functions. The autonomic nervous system has two divisions: the sympathetic and parasympathetic divisions.
Step-by-step explanation:
The autonomic and somatic nervous systems are the two main subdivisions of the peripheral nervous system (PNS). The somatic nervous system (SNS) controls voluntary actions, such as moving skeletal muscles, while the autonomic nervous system (ANS) regulates involuntary functions, such as the contraction of cardiac and smooth muscles and the secretion of glands. The ANS is further divided into the sympathetic division, which controls the fight-or-flight response, and the parasympathetic division, which controls routine functions in the body.