A. 3 – 6 days
B. 1 – 6 days
C. 8 – 15 days
D. 5 – 21 day
🧠 Explanation:
White blood cells have a lifespan of 5–21 days, fighting infections. For biology students, this highlights immunology, making it a key topic for studying human biology, health studies, and medical science. They protect against diseases. Understanding this ensures knowledge of immune systems. It’s essential for analyzing medical diagnostics, biology, and health sciences. Studying white blood cells offers insights into how immunity functions, crucial for biology, medicine, and health sciences, ensuring knowledge of their role in health.
