Blood Composition · NCERT Biology

The total WBC count in a healthy human averages between:

  1. 4,000 - 6,000 per mm3
  2. 6,000 - 8,000 per mm3
  3. 10,000 - 12,000 per mm3
  4. 1,000 - 2,000 per mm3
Show answer and explanation

Correct answer: 6,000 - 8,000 per mm3

Leucocytes are generally short-lived compared to RBCs. Their total count is much lower, averaging 6000-8000 per cubic millimeter of blood.

Difficulty: Medium Question 15 of 20

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