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.
Vladimir Putin linked to calendar model 40 years his junior. Does Vladimir Putin have a new love interest in this pin-up girl 20 years his junior? RUSSIAN strongman Vladimir Putin, 63, seems to have a new young girlfriend, now that his old girlfriend is a mother of three. The New York Post reports that sources say he is dating Alisa Kharcheva, 23, who posed as âMiss Aprilâ in an erotic calendar dedicated to Putinâs birthday in 2010 shortly after she graduated from high school.