If left to sit or if spun in a centrifuge, these components of blood will settle out into separate layers: the liquid plasma and the hematocrit, or packed cell volume. The image shows a tube of blood that has had these components separated out. Label the layers where indicated.                       A [ Select ] Hematocrit plasma erythrocytes leukocytes B [ Select ] plasma hematocrit leukocytes and erythrocytes leukocytes C [ Select ] buffy coat erythrocytes hematocrit plasma D [ Select ] erythrocytes plasma erythrocytes and leukocytes hematocrit