The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.
The heart is at the center of your circulatory system, which is a network of blood vessels that delivers blood to every part of your body. Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly.
Both mean a disease that has infected many people, but pandemic is probalby your best bet. I do not know for sure but this is what I would answer. Hope this helps!
A deficiency of <span>thiamine causes beriberi. If you need more help use this link </span>http://www.flashcardmachine.com/nursing-nutrition-chapter78.html
