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प्रश्न
Give reason for the following:
Only the veins and not the arteries are provided with valves.
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उत्तर
Veins carry the blood from the body part towards the heart while the arteries carry the blood
from the heart. Veins carry the blood against the force of gravity. Therefore, only the veins
and not the arteries are provided with valves.
संबंधित प्रश्न
State the exact location of the Chordae tendinae
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Draw a neat and labelled diagram.
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The oxygen-rich blood from the lungs comes into the ______ of the heart.
Fill in the blank:
The blood vessels which carry blood from the heart to different parts of the body are called ______.
True or false:
People with blood group ‘O’ are called universal recipients
True or false:
Blood group A has antigen A.
Describe how the exchange of oxygen and carbon dioxide gases takes place in the lungs.
The endocrine glands produce chemical substances called ____
