1. Blood enters into right atrium through

2. How respiratory system takes place in fish

3. Oxygenated blood is present in

4. Circulatory system transports through which thing

5. The largest artery which supplies blood towards the body is called

6. Which one is example of open circulatory system

7. Pulmonary means circulations in

8. In animals transport of gases nutrients is called

9. Types of closes circulatory system

10. Circulation of blood takes place in unicellular organisms through the

11. in close circulatory system blood is enclosed with in

12. Which type of circulation in vertebrates

13. Fish is an example of

14. The heart consists of

15. Movement of substances from higher concentration to lower is called

16. Circulatory system transports through which thing

17. Close circulatory system is More efficient and complicated as compare of

18. How many types of circulatory system

19. systemic means circulation in

20. In Fishes' heart ventricle pumps blood into