Question

the \buffy coat\ in a centrifuged blood sample is composed of
multiple choice
platelets and leukocytes.
leukocytes.
platelets.
erythrocytes.
erythrocytes and leukocytes.

Explanation:

When blood is centrifuged, the heaviest component (erythrocytes) settles at the bottom, the liquid plasma is at the top, and the thin middle buffy coat consists of the lighter cellular elements: white blood cells (leukocytes) and platelets.

Answer:

platelets and leukocytes.