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Mature RBC in mammals do not have c...

Mature RBC in mammals do not have cell organelles .

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The RBCs are devoid of nucleus, mitochondria ribosome and endoplasmic reticulum. The absence of these organelles accommodates, more haemoglobin thereby maximising the oxygen carrying capacity of the cell. Biconcave shape increase the surface area for oxygen binding, loss of mitochondria allow the RBC to transport all the oxygen to tissues and loss of endoplasmic reticulum allows more flexibility for RBC to move through the narrow capillaries.
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