Across
- 1. Takes blood towards the heart
- 4. First chamber of the heart that a deoxygenated blood cell enters in a fish heart
- 6. Where caseous exchange takes place in fish
- 7. Smallest blood vessel
- 8. Describes blood going to the gills
- 10. Number of chambers in the human heart
- 11. Mammalian circulation to the rest of the body
- 13. Describes the blood leaving the gills
Down
- 1. Found in the heart and veins, but not arteries
- 2. Mammalian circulation to the lungs
- 3. Where gaseous exchange takes place in mammals
- 5. Number of ventricles in the human heart
- 8. Describes the mammalian circulatory system
- 9. Takes blood away form the heart
- 12. Describes the fish circulatory system
- 13. Number of ventricles in the fish heart