Here's a breakdown:
* Chemical changes: These involve the breaking down of substances (catabolism) and the building up of new substances (anabolism). This includes processes like digestion, respiration, and the synthesis of proteins, fats, and carbohydrates.
* Physical changes: These involve changes in the physical state of matter, like the movement of blood, the contraction of muscles, and the flow of air in and out of the lungs.
Metabolism encompasses all these processes that occur within the body to sustain life. It's a complex and dynamic system that ensures our cells have the energy and materials they need to function.
