Tag: Article mis de l’avant

The systemic capillaries are tiny delicate bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood vessels that sustain life. They bridge the gap between the arteries and veins of the circulatory system. It is at this microscopic location that the respiration and nourishment of the cells of the human body take place.