The female mosquito uses its thin sucking tube to break the skin, find blood and inject the victim with a substance that keeps blood flowing.

VOA: special.2009.05.26

Chest compressions keep the blood flowing to the brain, heart and other organs.

VOA: special.2009.05.20

Seventy-eight-year-old Richard Stowe has a mechanical pump inside his chest that keeps blood flowing throughout his body.

VOA: standard.2010.01.27