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.
Michif was spoken over a wide area. In other areas many tribes used Plains Indian sign language (PISL) as a means of communication. This was a system of fixed hand and finger positions symbolizing ideas, the meanings of which were known to the majority of the tribes of the area. The role of the horse in Plains life