Which test is utilized to determine the morphology of white and red blood cells?

The peripheral blood smear is a crucial laboratory technique that allows for the assessment of the morphology of both white and red blood cells. In this test, a thin layer of blood is spread on a glass slide, stained, and then examined under a microscope. This method provides a detailed view of the size, shape, and presence of any abnormalities in the blood cells, enabling technicians to identify various types of blood disorders, infections, and other hematological conditions.

While other tests, like the complete blood count, provide numerical data on the number and proportion of different blood cells, they do not offer the visual analysis required to assess cell morphology in detail. Bone marrow biopsies are more invasive procedures typically used for specific conditions and don't primarily focus on the evaluation of blood cells in circulation. Flow cytometry is a sophisticated technique used to analyze the physical and chemical characteristics of cells, often for immunophenotyping in research and clinical settings, but it does not provide the same morphological insights as a peripheral blood smear.

Thus, the peripheral blood smear is the most appropriate choice for determining the morphology of white and red blood cells, highlighting its specific role in the assessment of blood cell health and disease.