Mitochondria is also known as the power house of the cell as it stores in it in the form of APT ( adenosine triphosphate ). It is the part where energy is released from food. B<font face="inherit">reakdown of pyruvate using oxygen takes place in the mitochondria. It is found in eukaryotic organism. It is found in animal cells. The energy is </font>released<font face="inherit"> from it when it is required and when it comes in the contact of oxygen. </font>