ANATOMY

Detailed explanation-1: -The autonomic nervous system is a component of the peripheral nervous system that regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion, and sexual arousal. It contains three anatomically distinct divisions: sympathetic, parasympathetic, and enteric.

Detailed explanation-2: -The SNS controls the involuntary actions, whereas the ANS controls the voluntary muscles.

Detailed explanation-3: -The hypothalamus is the key brain site for central control of the autonomic nervous system, and the paraventricular nucleus is the key hypothalamic site for this control. The major pathway from the hypothalamus for autonomic control is the dorsal longitudinal fasciculus.

Detailed explanation-4: -The autonomic nervous system regulates certain body processes, such as blood pressure and the rate of breathing. This system works automatically (autonomously), without a person’s conscious effort.

Detailed explanation-5: -The autonomic nervous system (ANS) is also called the vegetative nervous system. It controls the involuntary functions and influences the activity of internal organs.