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 are the largest terrestrial animal in North America. They can be over 6 feet tall. A male can weigh upwards of one ton and a female can weigh about 900 pounds.Thatâs one large animal! Diet: The American bison are herbivores.They like low growing grasses and sedges.he dominant bulls (male bison) choose a female and defend her against other males through fighting. The males might butt heads or use their horns. Once the female agrees to mate, the pair mates several times. The cows (female bison) are pregnant throughout the fall, winter and early spring.