Haematology is the study of blood and blood disorders. It involves the examination of blood cells and their characteristics, as well as the diagnosis and treatment of diseases related to blood.
For example, haematologists analyze blood samples to determine the number and types of blood cells present. They also study conditions such as anemia (a low red blood cell count) or leukemia (cancer of the blood cells).
Very Simple Definition:
Haematology is the study of blood and its problems. Haematologists look at blood to find out if it has any issues, like not having enough red cells or having cancer cells in it.