The life of the erythrocytes in mammalian blood is about:

120 days

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150 days

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190 days

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180 days

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Solution

The correct option is D 120 days
In mammals, erythrocytes or red blood cells (RBC) are the most abundant of all the cells in the blood.
On an average RBC are about 5 million to 5.5 millions per dL in the blood. .
RBCs have an average lifespan of 120-128 days after which they are destroyed in the spleen (graveyard of RBCs).
So, the correct answer is option A- '120 days'.

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