ihmisveren
ihmisveren, or human blood, is a circulating body fluid that transports oxygen, nutrients, hormones, and waste products, and plays a central role in immune defense and hemostasis. It consists of plasma—the pale-yellow liquid that contains proteins, electrolytes and clotting factors—and cellular elements: red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
Blood type systems, most notably ABO and Rh(D), determine transfusion compatibility. Matching donor and recipient helps
Blood donation is typically voluntary and altruistic. Collected blood is tested for infections, screened for donor
Transfusion practices aim to deliver safe, compatible products. Leukoreduction and irradiation are used in some cases
Cultural note: The concept of blood groups was identified by Karl Landsteiner in the early 20th century,