PATHOLOGY

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 medulla oblongata is the rod-shaped part of the brain which is seen below the cerebrum, located near the cerebellum of the brain. It controls involuntary actions like heartbeat and breathing.

Detailed explanation-3: -Medulla controls the functioning of the internal organs by controlling their involuntary actions such as heart beat, breathing, blood pressure and peristaltic movements of the alimentary canal.

Detailed explanation-4: -Final answer: Involuntary actions in the body are controlled by Medulla in hindbrain.