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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?
Explain stomata and its function in plants.
What is the function of RBCs?
What is the significance of dividing heart into different chambers?
Write the two functions of kidneys.
Explain pulse and pulse rate.
What is pulse?
What do you mean by dialysis? Explain.
State one function of the following:
Capillaries