Rheumatoid arthritis is a disorder in which the joints swell and cause pain. rheumatoid arthritis causes the body’s own immune cells to attack the membrane of the joints. which body system does rheumatoid arthritis affect?

nervous

musculoskeletal

integumentary

excretory

circulatory

It would be the musculoskeletal because the disorder focuses on the joints which are a part of the musculoskeletal body system.

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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the components of a vector are the parts of the vectors that are to each other.

b perpendicular