The rhythmical expansion and contraction of the arteries as blood is pumped through them by the beating of the heart. light year - Not a length of time but a distance, the distance a pulse of light travels in one year (about 5.88 trillion miles). pea - Comes from Greek pison, pulse, pease..
Scientists estimate the volume of blood in a human body to be approximately 7 percent of body weight. An average adult body with a weight of 150 to 180 pounds will contain approximately 4.7 to 5.5 liters (1.2 to 1.5 gallons) of blood. An average child with a body weight of 80 pounds will have approximately half the amount of blood as an adult. Blood carries out many critical functions in the body. It transports nutrients and oxygen to the body's cells.
Flaccid or erect, size depends on the amount of blood in the organ. Less blood means a smaller penis. Smoking narrows the arteries, including those that carry blood into the penis. Smoking limits blood flow into the organ, which makes it smaller.