Why are mitochondria known as "the powerhouse of the cell"?

Explanation

### Step-by-Step Solution:

1. **Definition of Mitochondria**: Mitochondria are organelles found in the cells of most eukaryotic organisms. They are often referred to as the "powerhouse of the cell."

2. **Role of Mitochondria**: The primary function of mitochondria is to produce energy. They do this by oxidizing food substances that are present within them.

3. **Oxidation Process**: Mitochondria take in oxygen from the surrounding environment, which is essential for the oxidation of food. This process involves breaking down food molecules to release energy.

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