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.
For centuries, Native Americans depended on bison as a source of food, clothing and shelter in order to survive on the open plains. But in the mid-1800s, ever-increasing hunting pressure began to take its toll. Unregulated shooting led to mass slaughters of bison in the 1870s, and by 1889, scarcely 1,000 bison remained. Today, wild bison are making a small comeback in a few scattered places, but they need more room to roam. Intolerance. The greatest threat to bison is the refusal of some humans to accept them.