The circulatory system comprises of the heart, the lungs and the  blood vessels. The main objective of the circulatory system is  transporting oxygenated (rich saturation of oxygen) blood around  the body. The de-oxygenated blood enters through the vena cava and  into the right atrium of the heart.
Vladimir Putin's Height. 5ft 6.5in (169 cm) The President of Russia. A newspaper once reported that there was criteria for the height of people in official photos with him, and that they shouldn't be taller. Shockingly, the newspaper said with a straight face Vladimir is believed to be between 5ft 2 and 5ft 5.
When Mr. Putin does meet with taller people, as in his one-day summit earlier this month with British Prime Minister Tony Blair, the cameras oblige by photographing the leaders from below, making both seem toweringly tall. The stratagem, part of a carefully cultivated Kremlin media offensive, appears to be working.