The formed elements of blood are vital components of the human body. They consist of erythrocytes, leukocytes and thrombocytes. Erythrocytes or red blood cells are responsible for transporting oxygen to the tissues and carrying carbon dioxide back to the lungs. They contain a substance called hemoglobin, which gives blood its red color. Leukocytes or white blood cells, protect the body from microbes, viruses and other foreign substances. They play a key role in the immune system by participating in phagocytosis, antibody formation and inflammatory processes. Thrombocytes or platelets are crucial in blood clotting. When a blood vessel is damaged they gather at the site of injury and help stop bleeding. All the formed elements of blood are produced in the bone marrow. Their number, shape and function are essential indicators of a healthy organism. An imbalance in these elements can signal various diseases. For example, a decrease in erythrocytes causes anemia, a low number of leukocytes weakens the immune system and a shortage of thrombocytes leads to impaired blood clotting. The formed elements work together to maintain homeostasis or the stability of the internal environment. Therefore, studying the formed elements of blood is very important for assessing human health.

formed elements, erythrocytes, thrombocytes, leukocytes, anemia, platelets, neutrophils, eosinophils, basophils, lymphocytes, monocytes , hematopoiesis, homeostasis, red bone marrow.

1.Marieb, E.N & Hoehn.K. (2019)- Human Anatomy and Physiology.(11th edition).

2.Hall, J.E. & Guyton, A.C.(2021) - Guyton and Hall Textbook of Medical Physiology.(15th edition).

3.Tortora, G.J & Derrickson,B. (2018)- Principles of Anatomy and Physiology.(15th edition)

4.Valerie, C. Scanlon & Tina Sanders , F.A. Davis Company- Essentials of Anatomy and Physiology.

5.Walker H.K, Hall W.D., Hurst J.W.(eds)- Clinical Methods: The History, Physical and Laboratory Examinations. Boston: Butterworths,1990. Chapter ,,Platelets”

6.Barrett K.E., Barman S.M, Brooks H.L, Yuan J.X.- Ganong’s Review of Medical Physiology (26th edition). McGraw-Hill2019.

7.Kenneth Kaushanskiy, Marshall A. Lichtman- ,,Williams Hematology.”

8.Victor Hoffbrand & Paul Moss- ,,Hoffbrand’s Essential Haematology”.

9.Richard McPherson & Matthew Pincus- ,,Henry’s Clinical Diagnosis and Management by Laboratory Methods”.

10.Biology Textbook for 8th grade Republic of Uzbekistan(2019).