Explore the fundamental components of blood in this comprehensive physiology video. Delve into the composition and functions of plasma, the liquid portion of blood, and gain a deep understanding of red blood cells (erythrocytes). Learn about the process of hematopoiesis, the formation of blood cells, and discover the roles of platelets (thrombocytes) and white blood cells (leukocytes) in the immune system. Examine the importance of erythropoietin (EPO) in red blood cell production and its significance in maintaining overall health. This in-depth exploration of blood physiology provides essential knowledge for students and professionals in the medical field.