It's literally, like, half of how youre alive? In a living thing it's called catabolism. It's the opposite of anabolism. Together they form metabolism

The hardest class for most people to get a biology degree is organic chemistry. It is mostly just memorizing reactions and being able to put them together and get from starting point x to ending point y.

Most everybody at some point learns

c6h12o6+602----->6co2+6h2o+energy

There are boundless reams of studies on just that one concept