Final answer:
The Complete Blood Count (CBC) is the laboratory test that examines whole blood to identify issues with blood cell count, size, or shape, indicative of potential diseases.
Step-by-step explanation:
The laboratory test that uses samples of whole blood to identify problems with the count, size, or shape of blood cells is the Complete Blood Count (CBC). This test provides a comprehensive picture of the composition of the blood, including the quantities and types of formed elements, such as red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Disorders could manifest as abnormalities in the cell counts, appearance, or ratios that might indicate various diseases or health conditions. A CBC is commonly used in clinical settings to assess a patient's general health and diagnose a wide range of disorders.