Structure [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.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.
Lewis and Clark had to think ahead and plan for times when wild game would be unavailable or in short supply. Their keelboat was stocked with nearly 7 tons of dry goods, including flour, salt, coffee, pork, meal, corn, sugar, beans and lard.
Meriwether Lewis Describes Crossing the Rocky Mountains. These selections from Meriwether Lewis' journal describe the crossing of the Rocky Mountains, a particularly hazardous stretch of the Lewis and Clark Expedition.In 1804 President Thomas Jefferson commissioned Lewis and William Clark to explore the vast territory of the Louisiana Purchase, recently acquired from France.oth Lewis and Clark, along with several other members of the Corps of Discovery, recorded their impressions of the expedition's often-perilous journey in carefully detailed journal entries.