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.
Many of the Plains tribes depended on the buffalo for survival. Several tribes followed the buffalo migration, harvesting conservatively to fill tribal needs. The Indians ate buffalo meat, used its hide for clothing and shelter. Sinews were used as bowstrings and bones were used as tools and weapons.