Asker's rating. 1  Fred is correct the smaller the number the bigger the metal. 2  12 gauge is thinner than 7 gauge. 3  The gague refers to the thickness of the metal in question. the issue of strenght is really determines by the type of metal, not necessarily it's thickness.
The left ventricle pumps oxygen-rich blood out of the heart and into an artery called the aorta. From the aorta, blood branches out into a series of ever smaller tube-like vessels: arteries, arterioles and finally capillaries. The capillaries deliver the blood's oxygen and nutrients to cells.
The right ventricle pumps the blood to the lungs through another valve, called the pulmonary semilunar valve, and then it returns to the left atrium. The blood flows through the bicuspid valve into the left ventricle. Again, when all the blood is in the left ventricle, the bicuspid valve slams shut to prevent blood from flowing backwards.