Question

6. How is urine prevented from flowing back to the ureters?
7. Why are the walls of the ventricles thicker than the auricles?
8. What happens to the glucose which enters into the nephron along with the filtrate?
9. Write any 3 differences between arteries and veins.
10. What happens if the circulatory system develops a leak? State in brief how could this be avoided?
11. What is double circulation in humans? Why is it necessary?​

Answer 1

Answer:

6) - there are Spinchers.

7) -ventricle have to pump blood throughout body.

8) -comes back by altrafiltration or comes out with urine.

Explanation:

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