12th Class Biology Sample Paper Biology - Sample Paper-3

  • question_answer
    Why the disease filariasis is also called elephantiasis?

    Answer:

    Filarial worms (W. bancrofti and W. malayi) cause proliferation of endothelial cells of the wall of lymph vessels which causes blockage of lymph vessels and swelling of certain body parts. When swelling occurs in the legs, then the legs become swollen like those of elephants.


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