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?
Name the following:
Components of blood
State the Function: Vitamin K
A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by the doctor for transfusion?
What is the shape of RBC in human blood?
Who discovered the Rh factor? Why was it named so?
What prevents the backflow of blood inside the heart during contraction?
What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
Name the only artery that carries carbon dioxide-rich blood.
Least abundant leucocyte is ______.
