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.
Australian Prime Minister Tony Abbott stands at 5ft 9in, while Russian President Vladimir Putin is just 5ft 7in. American President Barack Obama is 6ft 1in, Mexican President Enrique PeÃ±a Nieto is 5ft 7in and Canadian Prime Minister Stephen Harper towers above all the leaders at 6ft 2in.