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

2. Circulatory system transports through which thing

3. How respiratory system takes place in fish

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

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

6. Which one is example of open circulatory system

7. Which type of circulation in vertebrates

8. in close circulatory system blood is enclosed with in

9. How many types of circulatory system

10. Blood enters into right atrium through

11. Oxygenated blood is present in

12. Pulmonary means circulations in

13. The heart consists of

14. Circulatory system transports through which thing

15. Fish is an example of

16. Types of closes circulatory system

17. In animals transport of gases nutrients is called

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

19. In Fishes' heart ventricle pumps blood into

20. systemic means circulation in