Physiological processes are the functions and activities that occur within living organisms to maintain life. These processes include essential functions such as respiration, digestion, and circulation, which help convert food into energy, transport nutrients, and remove waste. They are vital for growth, reproduction, and overall health. These processes are regulated by various systems in the body, including the nervous system and endocrine system. For example, the nervous system controls reflexes and responses to stimuli, while the endocrine system releases hormones that regulate metabolism and other bodily functions. Together, these systems ensure that physiological processes operate smoothly.