Across
- 3. Movement of molecules from an area of high concentration to an area of low concentration.
- 4. The red pigment in blood cells that carries oxygen.
- 7. Organ that pumps blood throughout the body.
- 8. Blood vessels that carry blood away from the heart.
- 9. Herbivores have a longer ________ tract compared to carnivores.
Down
- 1. Primary energy-providing nutrient for animals.
- 2. Kingdom of mushrooms.
- 5. Process by which water moves through a semipermeable membrane.
- 6. Tiny structures within cells that control all functions of the cell.