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.
Bison to become first national mammal, joining bald eagle as American symbol. The bison will join the bald eagle, the national emblem since 1782, as Americaâs symbolic animal, in an effort to prevent it from going extinct. This article is 12 months old. Oliver Milman.