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Counting Blood Cells

OCR AS-level BiologyCommunicable DiseasesLesson 24 of 40

The hematocrit is the volume percentage of red blood cells (RBCs) in blood, measured as part of a blood test. The measurement depends on the number and size of red blood cells.

It is normally 40.7–50.3% for males and 36.1–44.3% for females.

White blood cells and platelet counts may also be measured.

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