THE MAIN COMPONENTS OF BLOOD: ERYTHROCYTES, LEUKOCYTES, PLATELETS, AND PLASMA
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Abstract
Blood is a vital connective tissue that performs essential functions in the human body, including transportation of oxygen, nutrients, hormones, and waste products. It also plays a critical role in immune defense and hemostasis. Blood consists of plasma and cellular elements—erythrocytes, leukocytes, and platelets—each of which has specific structure and function. Erythrocytes transport oxygen and carbon dioxide, leukocytes protect the body from infections, and platelets participate in coagulation. Plasma serves as a transport medium for nutrients, hormones, and plasma proteins. Understanding the composition and proportion of blood components is essential for clinical diagnostics, medical research, and therapeutic applications.
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