Which organelle is a mitochondrion picture what do it look like?

A mitochondrion is often depicted as a double-membraned organelle with a smooth outer membrane and a highly folded inner membrane, forming structures known as cristae. These folds increase the surface area for energy production. Mitochondria are typically oval or rod-shaped and are often referred to as the "powerhouses" of the cell, as they generate adenosine triphosphate (ATP) through cellular respiration. In images, they can appear as small, bean-like structures within the cell.