In eukaryotes, mitochondria are the organelles primarily involved in cellular respiration.

Here's a breakdown:

* Cellular respiration is the process by which cells break down glucose (sugar) in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate).

* Mitochondria are often referred to as the "powerhouses of the cell" because they are responsible for this crucial process.

Here are some key functions of mitochondria:

* ATP production: They carry out oxidative phosphorylation, the final stage of cellular respiration, where the majority of ATP is produced.

* Metabolic processes: Mitochondria participate in other metabolic reactions, including the breakdown of fatty acids and amino acids.

* Calcium signaling: They play a role in calcium signaling within the cell.

* Apoptosis: Mitochondria are involved in programmed cell death (apoptosis).

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