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प्रश्न
The chief function of lymph nodes is to
विकल्प
produce WBCs
produce hormones
destroy old RBCs
destroy pathogens
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उत्तर
destroy pathogens
संबंधित प्रश्न
Why is blood needed by all the parts of a body?
Explain the following:
Why is the closed circulatory system more efficient than the open system?
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Thin tube-like structures which are the component of circulatory system are called blood vessels.
Analogy
Arteries : Carry blood from the heart:: _________ :carry blood to the heart.
A female has haemophilic brother and parents having nonual blood clotting. She marries a male who has no history of haemophilia in his family. What is the possibility of her children having this disease?
Circulation is carried out by ______ in higher animals.
Name the following:
The structure that holds the heart valves in position.
Name these:
Two kinds of circulatory systems in different animals.
