The document provides an introduction to the topic of hematology. It discusses the course outcomes which are to perform ESR, PCV, and teach blood cell functions. The learning outcomes are to define hematology, classify the branches of hematology, describe the types of laboratory tests done in hematology, and explain the composition and components of blood. It then lists the key functions of blood including gas transport, nutrient transport, regulation of processes, thermoregulation, osmotic function, protective function, and detoxification.