In addition to the sink gauge, an important sign of quality is the finish of the steel. A satin-smooth finish will maintain its luster over time, even adding an attractive patina with age. A stainless steel sink with a surface gloss will wear more easily, show imperfections and will be more likely to need replacement before the alternative.
From the right ventricle, the blood is pumped through the pulmonary semilunar valve into the pulmonary trunk. The pulmonary trunk carries blood to the lungs where it releases carbon dioxide and absorbs oxygen. The blood in the lungs returns to the heart through the pulmonary veins. From the pulmonary veins, blood enters the heart again in the left atrium.
The blood picks up oxygen in the lungs, and then flows from the lungs: 1  to the pulmonary veins. 2  to the left atrium. 3  through the mitral valve. 4  to the left ventricle. 5  through the aortic valve. 6  to the aorta.