The abdominal aorta begins at the level of the diaphragm, crossing it via the aortic hiatus, technically behind the diaphragm, at the vertebral level of T12.It travels down the posterior wall of the abdomen, anterior to the vertebral column.tructure [edit]. The abdominal aorta begins at the level of the diaphragm, crossing it via the aortic hiatus, technically behind the diaphragm, at the vertebral level of T12. It travels down the posterior wall of the abdomen, anterior to the vertebral column.
Other Mesopotamian innovations include the control of water by dams and the use of aqueducts. Early settlers of fertile land in Mesopotamia used wooden plows to soften the soil before planting crops such as barley, onions, grapes, turnips, and apples. Mesopotamian settlers were some of the first people to make beer and wine. As a result of the skill involved in farming in the Mesopotamian, farmers did not depend on slaves to complete farm work for them, but there were some exceptions.
Fertile Land. The most important thing the Nile provided to the Ancient Egyptians was fertile land. Most of Egypt is desert, but along the Nile River the soil is rich and good for growing crops. The three most important crops were wheat, flax, and papyrus.he Egyptians even built their calendar around the Nile River. They divided their calendar up into three seasons. Akhet, or inundation, was considered the first season and was the time of the flooding of the Nile. The other two seasons were Peret, the growing season, and Shemu, the harvest season.