* Animals: All animals, from tiny insects to massive whales, rely on cellular respiration to break down food and generate energy.
* Plants: While plants produce energy through photosynthesis, they also use cellular respiration at night and even during the day to utilize the sugar they produce.
* Fungi: Fungi obtain energy from breaking down organic matter and use cellular respiration to extract the energy from these nutrients.
* Bacteria: Most bacteria, including those that live in our intestines and soil, use cellular respiration. There are some exceptions, such as anaerobic bacteria that use other energy-producing pathways.
* Protists: These single-celled eukaryotic organisms also use cellular respiration to generate energy.
Cellular respiration is a fundamental process for life as we know it. It's how organisms convert the chemical energy stored in food molecules into a form of energy that can be used to power all their cellular activities.
