★ Circulatory / Respiratory Quiz
If the trachea and esophagus were completely separate in humans, which of the following would NOT be needed?
A. swallowing
B. a nose
C. an epiglottis
D. a diaphragm
E. all are correct
Preview next quiz:
Which structure initiates a heartbeat?
A. AV node
B. SA node
C. left ventricle
D. left atrium
E. right ventricle
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