Read the following(A-D):
A. RBCs are the most abundant of all the cells in blood.
B. A healthy adult man has no an average $5$ Billions to $5.5$ Billions of RBCs $m m^{- 3}$ of blood.
C. RBCs are formed in liver in the adults.
D. RBCs are devoid of nucleus in most of the mammals and are biconcave in shape.
How many of the given statement are incorrect?

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Solution

Red blood cells are also known as erythrocytes. The synthesis of erythrocytes is called erythropoiesis. The average number of RBCs is between 4.2 and 6.2 million per cubic millimeter. RBCs are synthesized from bone marrow. They are biconcave in shape and most of the mammals do not have the nucleus in RBCs. Hence, B and C statements are incorrect.

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