Q38. What will happen if there are no platelets in the blood?

 

Q39. Why is heart known as the pumping organ of the human body?

 

Q40. What is Dialysis?

 

Q41. Why do veins have thin walls compared to arteries?

 

Q42. What are the three main types of blood vessels?

 

Q43. How plant roots absorb water and minerals from the soil?

 

Q44. Why is transport of materials necessary in a plant or in an animal? Explain.

 

Q45. Why animals such as sponges and hydra do not have blood?

 

Q46. Does transpiration serve any useful function in the plants? Explain.

 

Q47. Why is blood needed by all the parts of a body?

Or

What are the Functions of Blood in Human Body?

 

Q48. What are the three types of cells present in blood?

 

Last modified: Sunday, 6 January 2019, 6:34 PM