Which system regulates the organs of the body such as the heart and stomach?

The autonomic nervous system is responsible for regulating involuntary bodily functions, including the activities of organs such as the heart and stomach. It operates without conscious control and manages essential processes, such as heart rate, digestion, and respiratory rate, through two main subdivisions: the sympathetic and parasympathetic nervous systems.

This system continuously monitors the internal environment of the body and reacts accordingly. For example, when a person is stressed, the sympathetic nervous system may increase the heart rate and redirect blood flow to muscles, while the parasympathetic nervous system promotes relaxation and digestion during restful periods.

In contrast, the cognitive nervous system and the somatic nervous system are primarily involved in voluntary movements and processing sensory information, rather than regulating involuntary organ functions.