Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation of the joints. Autoimmune diseases are illnesses that occur when the body's tissues are mistakenly attacked by their own immune system.
What role did the bison or buffalo play in the culture of the Plains Indians? The bison were an important source of fur, food, and shelter for the Plains Indians. They used every part of the animals they killed. Bison were also an important part of their culture.
The Plains Indians lived in the huge area between the Mississippi and the Rocky Mountains. There were few trees but lots of wildlife. One of the most important animals to the Plains Indians was the buffalo. These tribes were well known for their religious ceremonies, hunting skills and warpath customs. A few of the Plains tribes include the Sioux, Cheyenne, Comanche and Blackfoot. American Indians - Plains Tribes and Southeastern Tribes.