How is energy generated?

Let's learn more about Aerobic Respiration.

In general, the human body cells are able to carry out both Aerobic & Anaerobic Respiration depends on the availability of oxygen.
Both types of respiration are able to generate energy (ATP) for us.
Lets take a look at the Krebs Cycle that occurs in the mitochondrion during aerobic respiration where most of our ATPs are generated.

ps: Krebs Cycle is not part of the SPM syllabus.