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

2. How respiratory system takes place in fish

3. Blood enters into right atrium through

4. Oxygenated blood is present in

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

6. Which one is example of open circulatory system

7. Types of closes circulatory system

8. Circulatory system transports through which thing

9. Pulmonary means circulations in

10. Fish is an example of

11. systemic means circulation in

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

13. How many types of circulatory system

14. Circulatory system transports through which thing

15. In Fishes' heart ventricle pumps blood into

16. The heart consists of

17. Which type of circulation in vertebrates

18. in close circulatory system blood is enclosed with in

19. In animals transport of gases nutrients is called

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