Sphenoid sinuses â behind the ethmoids in the upper region of the nose and behind the eyes. Each sinus has an opening into the nose for the free exchange of air and mucus, and each is joined with the nasal passages by a continuous mucous membrane lining.Therefore, anything that causes a swelling in the nose-an infection, an allergic reaction, or an immune reaction-also can affect the sinuses.inusitis is an acute or chronic inflammation of the nasal sinuses. Health care experts usually divide sinusitis cases into three categories based on the duration and frequency of occurrence.
President Thomas Jefferson commissioned the Corps of Discovery Expedition (1804-06), led by Meriwether Lewis and William Clark, to explore the territory acquired in the Louisiana Purchase, among other objectives. In 1801, Spain signed a secret treaty with France to return Louisiana Territory to France.
It stunned many people. In no way, shape or form, did we ever believe that our nation would expand so rapidly. What started with the small purchase of New Orleans led into the substantial purchase of the Louisiana Territory. This was a purchase that will make Thomas Jefferson a man to be remembered. Although, he wasnât the only man who impacted the United States during this time period. Meriwether Lewis and William Clark are the two men that are greatly known for their expedition across the Louisiana Territory. These two subjects, the Louisiana Purchase and the Lewis and Clark Expedition, altered our nation immeasurably. The Louisiana Purchase came as a surprise that neither Thomas Jefferson nor anyone else had ever dreamed of.