The calories in one teaspoon of sugar can vary slightly depending on the manufacture of the spoon, but also on how much you scoop up. Using a measuring spoon would be a good way to get the exact quantity of sugar a teaspoon actually has, which is particularly useful when you are baking.
Blood becomes oxygenated through the process of diffusion in the lungs, more specifically referred to as gas exchange. It is a passive process so that means that many capillaries need to be in close contact with the air that we inspire. In fact the most intimate contact we have with the external world is in our lungs.he veins lead the de-oxygenated blood back to the heart, where  it goes through the right atrium, right ventricle, and through the  Pulmonary Arteries to the lungs, where g â¦ as exchange happens.
Mar 17, 2016. All veins except for the pulmonary vein. The heart pumps oxygenated blood around the body by the arteries which then enter tissues through tiny capillaries. Once the oxygen has diffused across into the cells, carbon dioxide then bonds to the red blood cells instead. Now the blood has very little oxygen and lots of carbon dioxide. It is transported back to the heart by veins (of which the biggest is the vena cava) to be pumped up to the lungs.