What is the main function of the respiratory system? a
b
To protect the inner organs of the body from harm
To exchange carbon dioxide and oxygen
To coordinate the actions of the body
To regulate the body's functions by secreting hormones
C
d

When all the values in a data set are written in order from least to greatest, the value that is in the middle, with an equal number of values below it and equal number of values above it, is called the .

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Which statement best describes the role of the artificial heart? the artificial heart is a good replacement option for individuals who do not want a human heart. the artificial heart has been a great option because it can keep patients alive for a very long time. the artificial heart is not a good option because of the high possibility for rejection. the artificial heart has limited usefulness but can prolong life or be a tool to use while waiting for a transplant.