Topics: Body Fluid, Blood Physiology, plasma, red blood cells, Erythropoiesis, Proerythroblast, Basophil erythroblast, Polychromatophil Erythroblast, Reticulocyte, Matured Erythrocyte, Hemoglobin, anemia, Hemorrhagic Anemia, Hemolytic Anemia, Thalassemia, Nutrition Deficiency Anemia, Pernicious anemia, Megaloblastic anemia, Aplastic Anemia, Idiopathic Anemia, Polycythemia, white blood cells, Neutrophils, Eosinophils, basophils, immunity, antibodies, antigens, Antigen-Presenting Cells, Passive Immunity, Passive Natural Immunization, hypersensitivity, allergy, blood groups, hemostasis, Platelets