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 Indian has been one of the most important and pervasive icons in American culture. Imagine him, for example, as a young man on horseback. Almost without effort, the image conjures up full-blown narratives of buffalo hunts and mounted warfare.