★ Composition of Blood and Blood Cells Quiz
Identify the substance labeled “B” in this vial of blood.
A. Buffy Coat (platelets and WBCs)
B. Formed Elements (RBC)
C. Plasma
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Which blood cell contains hemoglobin?
A. Erythrocytes (RBC)
B. Leukocytes (WBC)
C. Thrombocytes (platelets)
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