GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Flame cell
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Spermatozoan
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Red blood corpuscles in man
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White blood corpuscles
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Detailed explanation-1: -In humans, as in all mammals, the mature RBC lacks a nucleus. This allows the cell more room to store hemoglobin, the oxygen-binding protein, enabling the RBC to transport more oxygen. RBCs are also biconcave in shape; this shape increases their surface area for the diffusion of oxygen across their surfaces.
Detailed explanation-2: -Abstract. Mammal red blood cells (erythrocytes) contain neither nucleus nor mitochondria. Traditional theory suggests that the presence of a nucleus would prevent big nucleated erythrocytes to squeeze through these small capillaries. However, nucleus is too small to hinder erythrocyte deformation.
Detailed explanation-3: -The nucleus is only found in white blood cells in mammals. In other vertebrates, the nucleus is present in the red blood cells, white blood cells, and platelets.