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Why walls of veins are thinner than the walls of arteries?
Why is heart known as the pumping organ of the human body?
Does transpiration serve any useful function in the plants? Explain.
How do plants absorb water and minerals from soil?
What is the function of RBCs?
Explain stomata and its function in plants.
What is the significance of dividing heart into different chambers?
Write the two functions of kidneys.
What is pulse?
Explain pulse and pulse rate.
State one function of the following:
Capillaries
What do you mean by dialysis? Explain.