(c) What are tiny filters S known as?
(d) Name
(i) liquid U   (ii) structure V   (iii) tubes W   (iv) tube X.

12. The organ ‘A’ of a person has been damaged completely due to a poisonous waste material ‘B’ has started accumulation in his blood, making it dirty. In order to save this person’s life, the blood from an artery in the person’s arm is made to flow into long tubes made of substance ‘E’ which are kept in coiled form in a tank containing solution ‘F’. This solution contains three materials ‘G’, ‘H’ and ‘I’ similar proportions to those in normal blood. As the person’s blood passes through long tubes of substance ‘E’, most if the wastes present in it go into solution ‘F’. The clean blood is then put back into a vein in the person for circulation. (AS1)

(a) What is organ A?
(b) Name the wastes substance B.
(c) What are (i) E, and (ii) F?
(d) What are G, H and I?
(e) What is the process described above known as?

13. Imagine what happens if waste materials are not sent out of the body from time to time?(AS2)

14. To keep your kidneys healthy for long period what questions will you ask a nephrologist/ urologist?(AS2)

15. What are the gum yielding trees in your surroundings? What procedure you should follow to collect gum from trees?(AS3)

16. Collect the information about uses of different kinds alkaloids, take help of Library or internet?(AS4)

17. Draw a neat labeled diagram of L.S of kidney?(AS5) 18. Describe the structure of nephron with the help of a daigram. (AS5)

19. Draw a block daigram showing the path way of excretory system in human beings. (AS5)

20. If you want to explain the process of filtration in kidney what diagram you need to draw.(AS5)

21. List out the things that makes you amazing in excretory system of human being.(AS6)

22. You read about ‘Brain dead’ in this chapter. What discussions would you like to have why you think so?(AS6)

23. We people have very less awareness about organ donation, to motivate people write slogans about organ donation?(AS7)

24. After learning this chapter what habits you would like to change or follow for proper functioning of kidneys?(AS7)

Fill In The Blanks

1. Earthworm excretes it’s waste material through ______________.

2. The dark coloured outer zone of kidney is called _____________.

3. The process of control of water balance and ion concentration with in organism is called________.

4. Reabsorption of useful product takes place in ____________ part of nephron.

5. Gums and resins are the __________ products of the plants.

6. Bowman’s capsule and tubule taken together make a ___________.

7. The alkaloid used for malaria treatment is ________________.