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 American Indians of the Great Plains were some of the most resourceful people in the world. They hunted buffalo, and used their hides and bones to make almost everything they needed, from clothes to buildings. Because they were such amazing hunters, they had enough time to do things not imperative to survival.