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. It then goes to the right  ventricle, directly below the atrium.
Pyramid of the Sun. Less than half a mile south of the Pyramid of the Moon is the Pyramid of Sun. At a height of more than 200 feet (63 meters) and a base more than 730 feet (225 meters) long on each side, this pyramid is one of the largest structures created in the pre-Columbian New World. It would have been completed around 200 AD.
There are three pyramids in Giza~   The Pyramid of Menkaura: 213 feet tall  The Pyramid of Khaefra: 471 feet tall  The Great Pyramid of Khufu: 481 feet tall   The Gâ¦reat Pyramid of Khufu is the tallest pyramid in Giza  and throughout Egypt.