long-necked dinosaurs Foraging

Sauropod dinosaur body is huge and it is the hugest one of all terrestrial vertebrates. It has small head, long neck and tail and it walks with its four stout limbs. They are on plants for food, live in the swamps Mainly. The most prosperous period of them is Jurassic age and they died out at the end of Cretaceous.

Famous Apatosaurus, Diplodocus, Brachiosaurus, and the Tianshan Mountains of China Dragon,mamenchisaurus, Euhelopus all are belongto the species. Its long neck often reminds us of the long-necked giraffe. Do they also feeding same as the girffe?
Long-necked sauropod dinosaurs live in the Jurassic and Cretaceous. Early in the last century, the sauropod dinosaur fossil was found the first time, its neck is described as straight as nearly level. However, The fossil dicovered recently was built: its head far above the ground, and neck with swan-like curve is almost perpendicular to the ground. This also gives rise to the debate that how the dinosaurs blood circulation provide blood to the head, some researchers even think that it may have more than one heart. It difficult to determine its initial form of the neck for the original fossil specimens are so heavy and brittle that difficult to move in their joints. Scientists use the software to simulate the neck shape of two long-necked sauropod dinosaur, Diplodocus and Apatosaurus. The software simulates the movement of each of the cervical spine geometry details getting a more complex three-dimensional picture. The results show that their neck is almost horizontal under a relaxed situation, and downward-sloping angle is very small. The neck of the Two kinds of dinosaurs is not so soft as the traditional hypothesis, The Diplodocus only can lift its head over the its back, The flexibility Apatosaurus slightly better than diplodocus. That means that long-necked sauropod dinosaurs eat the plants growing in the ground along the lake, rather than he same as the giraffes eatleaves growing in the tre.