* Photosynthesis is the process plants use to convert sunlight, water, and carbon dioxide into glucose (sugar) for energy. Humans cannot perform photosynthesis.
* Aerobic respiration is the process your body uses to break down glucose (from the food you eat) in the presence of oxygen to release energy in the form of ATP. This energy is then used to power your muscles for activities like running and biking.
In summary: You eat food, your body breaks it down into glucose, and then your cells use oxygen to convert that glucose into usable energy through aerobic respiration. This energy powers your muscles.
