50 million unnecessary antibiotics are prescribed for viral respiratory infections. It takes an interaction of 72 different muscles to produce human speech. The first known heart medicine was discovered in an English garden. In 1799, physician John Ferriar noted the effect of dried leaves of the common plant, digitalis purpurea, on heart action. Still used in heart medications, digitalis slows the pulse and increases the force of heart contractions and the amount of blood pumped per heartbeat.
Blood is red only in the arteries after it has left the heart and is full of oxygen.
Blood is a purplish, blue color in the veins as it returns to the heart, thanks to having picked up carbon dioxide and other wastes from the body's cells. In fact, your blood is red throughout only half your body. When cut, of course, the blood always appears red because it is instantly exposed to oxygen outside the body. Contrary to popular belief, hemophiliacs do NOT bleed to death from minor cuts. Hemophiliacs today may take clotting serums and often lead fairly normal lives.