biology

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