The main function of the mitochondria in a cell is to generate adenosine triphosphate (ATP), the cell’s primary energy currency. Mitochondria convert energy derived from nutrients through a process called cellular respiration, which involves breaking down glucose in the presence of oxygen. This energy production is crucial for various cellular processes including metabolism, movement, and growth. Thus, mitochondria are often referred to as the “powerhouses” of the cell, underscoring their vital role in cellular energy management.