Aerobic respiration is a process that cells use to convert glucose into energy. This process requires oxygen and takes place in the mitochondria, often referred to as the "powerhouse" of the cell. During aerobic respiration, glucose is broken down, and energy is released in the form of ATP (adenosine triphosphate), which cells use to perform various functions. In addition to energy, aerobic respiration produces carbon dioxide and water as byproducts. This is why we breathe out carbon dioxide after using oxygen. Many living organisms, including humans, rely on aerobic respiration to meet their energy needs, especially during activities like running or swimming.