The right answer is homeostasis.
Homeostasis refers to the ability of a system to maintain its inner environment in equilibrium. All the body mechanisms enter into homeostasis: heart rate, respiration, urination, sweating, digestion, body temperature, blood composition ... All these natural phenomena allow the balance of the whole body. the body and its normal functioning. The hormones secreted by the various glands of the human body as well as a part of the nervous system called vegetative or autonomic nervous system are the major elements of these regulatory phenomena.