| A | B |
|---|
| circulatory system | moves materials around the body, includes heart |
| respiratory system | brings oxygen into body, gets rid of carbon dioxide;includes lungs |
| cellular respiration | cells burn food to release energy |
| photosynthesis | cells use light energy to make food molecules |
| homeostasis | body maintains stable conditions |
| metabolism | sum of all chemical reactions going on in an organism |
| products of respiration | carbon dioxide, water, and energy |
| products of photosynthesis | sugar and oxygen |
| active transport | cells use energy to move materials |
| passive transport | materials move by diffusion to areas of lower concentration |
