What is Hematology?

What is Hematology?

Hematology is a branch of medicine concerning the study of blood, the blood-forming organs, and blood diseases.

The word (heme) comes from the Greek for blood.

The history of hematology dates back to ancient Egypt and the use of blood-letting tools. A major breakthrough in the study of blood occurred in 1642 when Anthony van Leeuwenhoek built a microscope and identified blood cells. In 1770, William Hewson, the ‘Father of Hematology’, introduced the clotting features of blood and shared his knowledge of leukocytes, or white blood cells. It wasn’t until 1818 that James Blundell successfully completed the first recorded blood transfusion between humans, but the world would have to wait almost another hundred years before Reuben Ottenberg used blood typing to conduct transfusions and identified the universality of type O blood.

If you’ve ever been really sick, you may have had blood drawn for analysis. Our blood can hold secrets that aren’t readily visible to the naked eye. When the blood fails to function normally, diseases such as anemia, clotting disorders, leukemia, and a number of others can occur. The study of blood and its disorders is called hematology.

Scientists or doctors who study the blood are called Hematologists, and they specifically look at blood health and blood diseases. Blood is composed of red blood cells, white blood cells, and platelets. Organs of the body affected by, or used to, transport blood include the blood vessels, bone marrow, lymph nodes, and spleen. Proteins in the body are also involved in bleeding and clotting.

Normal Blood Film

Blood Cells

Hematologists investigate, diagnose and treat diseases such as anemia, leukemia, and lymphoma. They also care for patients with blood-clotting abnormalities and are responsible for ensuring that blood transfusions are safe and available when they are needed.

Hematologists work in laboratories as well as with patients in clinics and on the wards. They can be involved throughout the patient’s journey, from the first hospital visit, through laboratory diagnosis to treatment.

Hundreds of thousands of blood tests are done every day.

Haematologists give advice to other doctors about any abnormalities that show up and may recommend further tests to get to the bottom of the problem.


Danielle Haak PhD. What is Hematology? – Definition & History http://study.com/academy/lesson/what-is-hematology-definition-history.html

Ananya Mandal, MD. What is Hematology? https://www.news-medical.net/health/What-is-Hematology.aspx

Choosing Hematology as a Medical Student http://www.hematology.org/Trainees/Choose-Hematology/

What is Hematology?
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What is Hematology?
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