What organ system maintains blood oxygen and carbon dioxide levels?

What are the result of when individual components in an organism interact with others to create noval stucture and function called

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

What are the proteins in connectivity tissues of your foot examples of?