The chemical name for the process of breathing is "respiration." This encompasses both inhalation and exhalation, where oxygen is taken into the lungs and carbon dioxide is expelled. There are two types of respiration: aerobic, which occurs in the presence of oxygen, and anaerobic, which occurs without oxygen. Cellular respiration is the process by which cells convert glucose and oxygen into energy, water, and carbon dioxide. It is essential for sustaining life, providing energy for all biological processes, allowing organisms to grow, reproduce, and respond to their environment.