Question

Write a note on erythrocytes.

Answer 1

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