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.
Explore the Time Line of the American Bison created by the U.S. Fish and Wildlife Service. Bison are part of the family Bovidae, to which Asian buffalo, African buffalo and domestic cattle and goats belong. Because American bison resembled in some ways old world buffalo (Asian and African buffalo), early explorers to North America began to call them buffalo.