During examination of a spun hematocrit, in which layer are the white blood cells found?

The buffy coat is the correct layer where white blood cells are found during the examination of a spun hematocrit. When a blood sample is centrifuged, it separates into distinct layers based on the density of the components. The bottom layer consists of packed red blood cells, while the upper layer is plasma, which is primarily made up of water, electrolytes, and proteins.

In the middle, between the packed red cells and the plasma, lies the buffy coat, a thin layer that contains white blood cells (leukocytes) and platelets. This layer is significant because it is where the immune cells are found, which play a crucial role in the body's defense mechanisms. The presence of the buffy coat allows for easy identification and extraction of white blood cells for further laboratory analysis or testing, making it an important aspect of hematology.