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Which of the Following Structures Closes Over the Trachea to Protect

question 2

Multiple Choice

Which of the following structures closes over the trachea to protect it during swallowing?


Definitions:

Pulmonary Veins

Veins that transfer oxygenated blood from the lungs to the left atrium of the heart.

EDV

End-Diastolic Volume, the amount of blood in the ventricles of the heart immediately before it contracts.

ESV

End-Systolic Volume, the volume of blood in the ventricle at the end of contraction, just before ventricular relaxation.

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