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# Blood Analysis This document describes the results of blood analysis. ## Questions and Answers | Question | Answer | |---|---| | What is the hematocrit (PCV)? | An estimate of the volume of packed erythrocytes per unit volume of blood. | | What happens if blood is removed from the circulatory s...

# Blood Analysis This document describes the results of blood analysis. ## Questions and Answers | Question | Answer | |---|---| | What is the hematocrit (PCV)? | An estimate of the volume of packed erythrocytes per unit volume of blood. | | What happens if blood is removed from the circulatory system? | It will clot. | | What does the clot contain? | Formed elements and a clear yellow liquid called serum, which separates from the clot. | | What happens if blood is collected into a tube that contains an anticoagulant material? | It will not clot. | | What occurs when blood with anticoagulant is centrifuged? | It will separate into about 3 layers. | | What is the composition of the lowest red layer? | Composed of erythrocytes and constitutes about 40-45%. | | What is the second layer described? | The translucent, yellowish, supernatant plasma. | | What is the thin layer between the two layers called? | Known as the buffy coat. |