Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
State the Function: Vitamin K
All veins carry deoxygenated blood.
Why is the colour of the blood-red?
Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its functions.
______ are produced in the bone marrow.
Blood is a fluid connective tissue.
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 organ which is located in the chest cavity with its lower tip slightly tilted towards the left.
Name the only artery that carries carbon dioxide-rich blood.
Define the following term:
Blood
