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.
brother. While Lewis and the main expedition were hauling their equipment over the Continental Divide, Clark and a few men went ahead to see if the expedition could expect to build boats and float down the Salmon. He did not have to go too far into the canyon to tell that it was far rougher than any country he had ever seen--and the Indians assured him that he had seen nothing yet in the way of rugged canyons. So Lewis and Clark had to trade for Shoshoni horses and to go north 160 miles to the Lolo Trail over a route that an elderly Shoshoni guide led them. Then, when they reached Lolo Pass on September 13, 1805, they found that they had made a great unnecessary detour to the south in searching out the headwaters of the Missouri. But, at last