Erythrocytes (red blood cells) in humans have an average lifetime of about 120 days. After this period, they are considered old or damaged, are removed from the circulation by macrophages in the spleen and liver, and their components are recycled to create new cells.
Once the erythrocytes enter the blood in humans, it is estimated that they have an average lifetime of?
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Question context
This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.