Learning about Hematology

Definition of Hematology

Hematology as a branch of medicine involves studying the prevention, causes, diagnosis and treatment of diseases and disorders related to the blood. The term hematology was gotten from a greet word “HAIMA” which means “BLOOD” and logy (-λoγία) which means “STUDY”.


This involves treatment of diseases that are affected by production of blood and blood components (hemoglobin, platelets, blood vessels, spleen and blood cells), coagulation mechanisms (e.g. blood clots, hemophilia), bleeding disorders and cancers (leukemia, lymphoma).

About the Blood

Blood is made up of Red blood cells, white blood cells. Platelets and plasma. The red blood cells makes up of about 45 percent of the blood. It carries oxygen from the lungs to the body tissues and also carries carbon dioxide from the lungs to be exhaled. They are produced in the bone marrow and disc-shaped. The white blood cells and the platelets are approximately 1% of the blood. While the white blood cells helps to fight infections, the platelets which are small interacts with clotting proteins to prevent or stop bleeding. The plasma is composed of about 92% of water which makes it the fluid part of the blood contains proteins, minerals salt, sugar, fats, vitamins and hormones.


Some Hematology Tests includes

  1. Complete blood count, or CBC
  2. Blood chemistry test
  3.  Blood enzyme test
  4. Blood tests to assess heart disease risk.


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