The largest artery in your body is the Aorta. The largest vein in the body is Vena Cava. The aorta is the largest blood vessel in the body. It is an artery that directly arises from the heart itself and descends through the thorax and into the abdomen. All the arteries of the body, save the pulmonary arteries, stem from the aorta or one of its main branches.
There are many different dinosaur books that state different sizes of the tyrannosaurus rex. These sizes range from 40 feet long to 49 feet long. It's maximum length was probably close to 50 feet long. The paleantologists have only found remains, incomplete remains, of the Tyrannosaurus.
With long front legs and shorter rear legs, Brachiosaurus was built to feed high in trees. Illustration by Franco Tempesta. Brachiosaurus was a gigantic dinosaur. Scientists have estimated its weight at more than 28 tons (25 metric tons). Its neck and head stood up more than 40 feet (12 meters) in the air. The most complete skeletons found belong to animals not yet fully grown. So Brachiosaurus probably grew even longer and taller than we know.