Organ function refers to the specific roles that different organs play in maintaining the body's overall health and efficiency. Each organ, such as the heart, lungs, and liver, has unique responsibilities. For example, the heart pumps blood throughout the body, delivering oxygen and nutrients, while the lungs facilitate the exchange of oxygen and carbon dioxide. The proper functioning of these organs is crucial for survival. When an organ does not work correctly, it can lead to health issues. For instance, if the kidneys fail to filter waste from the blood, toxins can build up, causing serious complications.