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 blood exchange gases at the lungs' alveoli, and then the blood returns to the heart via pulmonary veins, freshly oxygenated by the alveoli. The pulmonary vein carries the blood to the left atrium, and then the blood is forced into the left ventricle through the mitral valve.lows through the bicuspid valve to the left ventricle. pumped out of the left ventricle through a semi lunar valve into the aorta. branches through series of arteries to all parts of the body. Leaves the body tissues via various veins and re enters the right atrium of the heart via the vena cava.