Explanation

Mitochondria are correctly known as the powerhouses of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP). Vesicles are small membrane-bound sacs involved in transport, not primary energy production. Lungs are organs for respiration in multicellular organisms, not organelles within a cell. Liver is an organ in the body that performs many metabolic functions, but it is not a cellular component.