Page 109 - Science Class 07

4. Write the role of liver in blood circula on.
5. What is the need for the blood transfusion?

6. What do you mean by the systemic circula on of blood?
7. What is heart beat?
8. Describe blood circula on of earthworm.

G. Long answer ques ons.
1. What do you understand by blood circula on in human body?
2. Explain the structure of heart with diagram.
3. What is the role of kidney and liver in the circula on?

4. Explain the circulatory system in amoeba and earthworm.

Project
Project
Project ActivityActivityActivity
Project Activity
A. Blood dona on is very important. It can save the life of others. But there is a misconcep on
among the people that the blood donor becomes weak when he donates blood. It is not
true. Actually, our body has a wonderful mechanism through which it produces blood
naturally. Try to know more about this topic and write about it in the space provided below.
_____________________________________________________________________________
_____________________________________________________________________________

_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________

_____________________________________________________________________________
_____________________________________________________________________________
B. Visit a pathological laboratory and try to know about different types of blood tests and how
different diseases are detected a er blood tests.

HO
HO
HOTSTSTS
HOTS
A. Which side of the heart has oxygenated (oxygen-rich) blood and which side has deoxygenated
(carbon dioxide-rich) blood?
B. Why is the colour of blood red, though it has cons tuents of different colours?

Science-7 109