ANATOMY

Detailed explanation-1: -Actions which take place without consciousness or willingness of an individual are called the involuntary action. Digestion, heart beating, sneezing, etc are few examples of involuntary actions. Both involuntary and voluntary actions are controlled by the same parts of the brain.

Detailed explanation-2: -Some functions are involuntarily performed, such as breathing, digestion, heart beating, eye reflexes, etc., but some involuntary actions have voluntary control to a certain extent – examples are breathing, salivation, deglutition (swallowing), defecation, micturition (urination) and others.

Detailed explanation-3: -Your breathing usually does not require any thought, because it is controlled by the autonomic nervous system, also called the involuntary nervous system.

Detailed explanation-4: -Breathing is both voluntary and involuntary action as it is controlled by two nerves, one belonging to the voluntary system and the other belonging to the involuntary system. We can control breathing completely and voluntarily and it can act completely involuntarily as well.