Present in nearly all types of human cell, mitochondria are vital to our survival. They generate the majority of our adenosine triphosphate the energy currency of the cell. Mitochondria are also involved in other tasks, such as signaling between cells and cell death@glsow2021
Mitochondria function as batteries that produce more than 90% of the energy in your body's cells. Mitochondria are really important in high-energy demanding organs such as your heart, liver, muscles and brain. 40% of each heart muscle cell is mitochondria @GLSOW2021