ANATOMY

Detailed explanation-1: -2 instinctive. 3 reflex, uncontrolled.

Detailed explanation-2: -Words related to autonomic autonomous, democratic, freed, independent, separate, emancipated, enfranchised, liberated, sovereign, ascetic, automatic, at liberty, autarchic, individualistic, self-directing, self-governing, sui juris, unconstrained, unenslaved, unregimented.

Detailed explanation-3: -One part of the involuntary nervous system helps the body rest, relax, and digest food and another part helps a person fight or take flight in an emergency. Also called ANS and autonomic nervous system.

Detailed explanation-4: -Reflex action or reflex is an involuntary action in response to a stimulus. This is a spontaneous action without thinking.