I need help with what is happening inside the mitochondria.

may help me what's happening 0-50 secondes.
h t t p: // w w w.y o u t u b e.c o m / watch ?v=RrS2uROUjK4

"These structures are sometimes described as "cellular power plants" because they generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy.[2] In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.[3]"

google mitochondria and you'll find that on wiki