A chronic disease persistent or recurring disease, usually affecting a person for three months or longer. It is generally one that is hereditary or one that is the result of factors such as poor diet and living conditions, using tobacco or other harmful substances, or a sedentary lifestyle.yme disease is an example of a chronic disease transmitted to human via deer ticks. Endometriosis is classified as a chronic disease. Using tobacco can increase a person's chances of developing a chronic disease.
The Missouri River is the longest river in the United States. It flows for 2,466 miles (3,968 kilometers). Its source lies in the Rocky Mountains of southwestern Montana; the river is formed by the confluence of the Jefferson, Madison, and Gallatin rivers at Three Forks, Montana.
Great Plains Region. The journey up and down the Missouri River was to comprise 5,000 miles of the expedition's total mileage of 8,000. It was their waterway north and west across the territory called the Louisiana Purchase, land the United States had recently purchased from France for $15 million, and which doubled the size of the country.