Presentation on theme: " The function of the circulatory system is to transport substances such as gases (O 2, CO 2 ), nutrients/wastes, hormones, immune system. It is also."— Presentation transcript:
The remaining 45% is mostly red blood cells with a few white blood cells. Red blood cells have no nuclei. They contain the protein hemoglobin which is used to carry oxygen.
White blood cells are part of the immune system. They protect the body from infections by engulfing foreign bacteria and producing antibodies.
Atherosclerosis: hardening of the arteries Heart disease: cardiac vessels are blocked, weakening heart Stroke: blood vessels in the brain burst causing brain damage Hemophilia: blood does not clot properly Sickle-cell anemia: Reduced number of red blood cells due to abnormal hemoglobin