Human erythrocytes are 3 times less than frog erythrocytes, but there are 13 times more of them in 1 mm3

Human erythrocytes are 3 times less than frog erythrocytes, but there are 13 times more of them in 1 mm3 than in frogs. How to explain this fact?

In a frog, breathing is carried out with the help of the lungs and with the help of the skin. In humans, oxygen is carried only by erythrocytes. In addition, human erythrocytes do not contain a nucleus in a mature state, so they carry more oxygen.



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