Haematology is the study of blood and its vital components—such as red and white blood cells and platelets. It plays a crucial role in identifying conditions like anaemia, infections, and blood cancers. Blood serves many essential functions, including oxygen transport and immune defense. Even a basic blood test can provide significant insights into overall health. Haematology is fundamental in diagnosing diseases, guiding treatment, and often saving lives. It remains a cornerstone of modern medical care.