khiyati के संदर्भ में ईसाई मानक 26 में दर्शाए प्रार्थना बताइए
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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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