Mitochondria

There are many organelles, inside the cell.

The mitochondria is one such organelle.

It is the energy factory, of the cell.

A single cell can contain many mitochondria.

Cells which have to do more work, like muscle cells, have more mitochondria.

The mitochondria produces ATP.

ATP is the universal molecule for energy storage.

Even small single cellular organisms, use ATP for energy.

It is believed that LUCA, Last Universal Common Ancestor,

used ATP for energy storage, billions of years ago.

Even today the cells use the same ATP.

The mitochondria, has an outer membrane,

and an inner membrane.

The region between the outer and inner membrane,

is called as the inter membrane space.

The outer membrane, is permeable to oxygen and glucose.

The inner membrane, is highly folded.

It is called as cristae.

This increases its surface area, for the electron transport chain,

or ETC processes.

ATP is synthesised in the electron transport chain.

The inside of the inner membrane, is called as the matrix.

This is where, the Krebs cycle, takes place.