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.
During the early years, Rocky Mountain bison meat served as the main substance for the trappers. By the early 1840s, the Mountain Men and the Indians had annihilated the buffalo in the Rocky Mountains. The trappers also helped to reduce the herds of elk, moose, and deer.