Mitochondria are found in eukaryotic cells.
Each mitochondrion is a double membrane bound
structure. Space between two membranes is called “Outer mitochondrial space”
while space inside to inner membrane is known as “Inner mitochondrial space”. Fluid In inner mitochondrial space is called as “Matrix”.
Inner mitochondria membrane forms many finger like infoldings towards matrix .These infoldings
are known as “Cristae” (singular –Crista). Cristae has many studded particles
i.e. “F1 particle or Oxysomes”.
Mitochondria are
considered as “Semi-autonomous cell organelle because its matrix also contains
circular DNA, some RNAs and 70S ribosomes. Mitochondria divide by fission.
 |
| Structure of Mitochondria |
Functions – Mitochondria are the site of
aerobic cellular respiration. It produce
energy in the form of ATP which is utilized in various vital activities in cell
. So mitochondria are also known as “Power House of the Cell”.
Sometimes mitochondria are responsible for heat
production i.e. Thermogenesis. This is found in some mammals of cold regions
and in hibernating animals.
