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प्रश्न
Write a note on erythrocytes.
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उत्तर
RBC (Red Blood Corpuscles) or Erythrocytes:
- Erythrocytes are circular, biconcave and non-nucleated cells.
- Their diameter is 7μ and are 2.5μ thick.
- In adult male, RBC count is 5.1 to 5.8 million per cubic millimeter, while in female, it is 4.3 to 5.2 million per cubic millimeter.
- Normal life span of a single RBC is about 120 days.
- Formation of RBCs is called erythropoiesis.
- Erythropoiesis in foetus, takes place in yolk sac, kidney, spleen and liver while in adults, it takes place in red bone marrow.
- Stroma of RBC contains haemoglobin which helps in carrying respiratory gases.Old and worn out RBCs are destroyed in spleen and liver
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