Ключевые слова: anatomy, anemia, artery, background, biology, biomedical, blood, blood cells, blood disorders, bloodstream, cancer, care, cell, cell biology, cells biology, circulation, conceptual, disease, donate, flow, give, health, heart, hematology, hemostasis, human, illustration, infection, laboratory, leukemia, medical, medical diagnosis, medical illustrations, medicine, microbiology, microscope, microscopic, microscopy, plasma, red, science, scientific, structure, system, therapy, treatment, vein,