प्र2 टकराव से बचने के लिए बेल्जियम सरकार ने क्या- क्या क
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Explanation:
Shape of Red Blood Cells. Erythrocytes are biconcave discs with very shallow centers. This shape optimizes the ratio of surface area to volume, facilitating gas exchange. It also enables them to fold up as they move through narrow blood vessels.
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