Question 6 of 10
3 points
they is a group of organs used for breathing in oxygen and getting rid of
carbon dioxide.
o
a. respiratory system
b. immune system
o
o
c. urinary system
d. endocrine system
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Which of the following is not a symptom of chronic fatigue syndrome a) pain in joints with swelling b) low-grade fever c) unexplainable muscle weakness or pain d) forgetfulness, irritability, and confusion

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