The characteristic of the autonomic nervous system is that it regulates involuntary activity in the heart, stomach, lungs, and intestines.
The autonomic nervous system (ANS) is a division of the peripheral nervous system that controls and regulates involuntary functions of the body. It operates independently and automatically, without conscious effort or control.
The ANS is responsible for regulating various bodily processes that occur without conscious control, including heart rate, digestion, respiration, blood pressure, and glandular secretion. It consists of two main divisions: the sympathetic nervous system and the parasympathetic nervous system, which often have opposing effects on target organs.