Final answer:
The buffy coat in a centrifuged sample of blood is the thin, pale layer that separates the red blood cells from the plasma and is composed of white blood cells and platelets.
Step-by-step explanation:
In a centrifuged sample of blood, the buffy coat is the thin, pale layer that separates the red blood cells from the plasma and is composed of white blood cells and platelets (also called leukocytes and thrombocytes respectively).