2. He Your heart is a muscle that pumps blood to all parts of the body. The blood provides your body with the oxygen and nourishment it needs to function. Waste products carried by the blood are removed from the body by the kidney and the lungs.

3. Blood pressure Blood pressure is the pressure of the blood in your arteries as the heart pumps it around your body. If your blood pressure remains high it can also lead to serious problems, such as a heart attack, a stroke, heart failure or kidney disease.