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.
Menkaure's pyramid had an original height of 65.5 metres (215 feet) and was the smallest of the three major pyramids at the Giza Necropolis. It now stands at 61 m (204 ft) tall with a base of 108.5 m. Its angle of incline is approximately 51Â°20â²25â³. It was constructed of limestone and granite.