Bones in your joints are covered with a smooth and slippery material called cartilage?
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anyone from cca
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How is the structure of our circulatory system and respiratory system related to the function of both these systems?

Which word can describe a person's gender identity? a) female b) intersexual c) asexual d) androgynous

Which of the following must be treated under the care of a physician and is mainly considered a medical condition? a. scoliosis b. lordosis c. kyphosis d. all of the above