Answer :
Haematology is the study of the physiology and pathology of the cellular elements of blood. The three major cellular components of blood are red blood cells (erythrocytes), white blood cells (leukocytes) and platelets (thrombocytes). However, Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations.
Hematology is the study of the physiology and pathology of the cellular elements of blood. The three major cellular components of blood are red blood cells, white blood cells, and platelets.