SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4 years
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4 days
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4 minutes
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4 months
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Detailed explanation-1: -Red blood cells (erythrocytes) Red blood cells make up almost half of your blood. The lifespan of a red blood cell is around 120 days.
Detailed explanation-2: -Human red blood cells (RBC), after differentiating from erythroblasts in the bone marrow, are released into the blood and survive in the circulation for approximately 115 days.
Detailed explanation-3: -Red cells have an average life span of about 120 days after which they are cleared by-phagocytosis by reticuloendothelial macrophages due to accumulated changes during their life span. Approximately 5 million erythrocytes (the average number per l) are removed from the circulation every second.
Detailed explanation-4: -The average life cycle of a human RBC is approximately 120 days. Generally, by this point, the cell is worn out and damaged. RBCs pass through both the spleen and liver, where specialised immune cells called macrophages are found.