A cell can have hundreds of mitochondria.

They are extremely important to the function of the cell producing energy-rich ATP molecules from respiration.

Electron micrograph of a cell with mitochondria identified.

Mitochondria are double membrane organelles.

Like chloroplasts, they contain their own DNA, RNA and ribosomes and are able to make their own proteins independent of the nucleus.

Electron micrograph with a closer view of mitochondria.

The inner membrane of the mitochondria is called the cristae and the matrix around the cristae is called the stroma.

The enzymes involved in respiration are associated with the cristae membranes.

Electron micrograph of a mitochondria with the cristae, outer membrane, and stroma identified.