Hard

The normal range of the number of white blood cells in a microliter of blood is between _________ ?

Correct answer: B. 4,500 and 10,000

  • A. 2,500 and 09,300
  • B. 4,500 and 10,000
  • C. 4,900 and 12,000
  • D. None of these

Explanation

A normal white-cell count is roughly 4,500–10,000 cells per microlitre. Counts outside this range may indicate infection, inflammation, or another medical condition, though laboratory ranges vary slightly.

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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.

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