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In Amphibians and Reptiles, the left atrium receives oxygenated blood from the gills/lungs/skin, and the right atrium receives the deoxygenated blood from other body parts. However, they get mixed up in the single ventricle, which pumps out mixed blood. This type of circulation is called-

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Important Questions on Body Fluids and Circulation

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The blood vessel which carries oxygenated blood from the lungs to the heart is:
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Highly active scavenger cells are -

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Process of formation of blood corpuscles is called :
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Which of the following statements are incorrect?
(i) Leucocytes disintegrate in spleen and liver.
(ii) RBCs, WBCs and blood platelets are produced by bone marrow.
(iii) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(iv) Important function of lymphocytes is to produce antibodies.
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Which of the following corpuscle has kidney shaped nucleus?

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Arteries do not have valves but veins do, because :
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In an undamaged blood vessel, conversion of prothrombin to thrombin is prevented by
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Which of the following elements is found in haemoglobin and myoglobin?