Advertisements
Advertisements
प्रश्न
Veins have valves that allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?
Advertisements
उत्तर
Blood flow in arteries is rapid as the blood in them is under great pressure. Thick elastic walls of arteries are not collapsible and maintain one direction rapid flow.
APPEARS IN
संबंधित प्रश्न
What makes the blood look red?
What are the various components of blood? State their functions.
State the Function: Vitamin K
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
Crab has blue blood.
______ are produced in the bone marrow.
What prevents the backflow of blood inside the heart during contraction?
The blood leaving the tissues becomes richer in
Least abundant leucocyte is ______.
Find out about blood groups and their importance.
