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.
What does the left ventricle do? The left ventricle is separated from the aorta by the aortic valve, which prevents blood from flowing back into the ventricle with each contraction. As an artery, the aorta moves blood away from the heart toward the rest of the body. Oxygenated blood travels through the aorta to provide nourishment to the body's tissues. The right ventricle pumps blood only to the lungs. The left ventricle, therefore, has thicker walls than the right because it needs to pump blood to all the organs. This generates the high blood pressure found in the aorta.