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.
Systemic circulation is the part of the cardiovascular system which carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart. Is is what the arteries and veins do. The heart sends oxygenated blood through the arteries to the capillaries, where the oxygen is then taken out of it.