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

2. in close circulatory system blood is enclosed with in

3. The heart consists of

4. In Fishes' heart ventricle pumps blood into

5. Circulatory system transports through which thing

6. Types of closes circulatory system

7. Which one is example of open circulatory system

8. Fish is an example of

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

10. In animals transport of gases nutrients is called

11. How many types of circulatory system

12. Blood enters into right atrium through

13. systemic means circulation in

14. Pulmonary means circulations in

15. Which type of circulation in vertebrates

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

17. How respiratory system takes place in fish

18. Oxygenated blood is present in

19. Circulatory system transports through which thing

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