Mitochondria are the powerhouse of the cell. These structures are nicknamed the powerhouse of the cell because they work to convert energy into forms that the cell is able to use.
Mitochondria are semi-autonomous cells, which means that they only rely partly on the cell for division and growth. Mitochondria are contained in two membranes and have their own DNA and ribosomes. In addition, mitochondria are capable of providing their own protein. Mitochondria are also able to divide to produce more mitochondria. Many degenerative conditions and diseases are a result of defects within the mitochondria, which is commonly known as mitochondrial disease.