题目内容

The structure that holds the vocal cords is the ________.

A. larynx
B. tongue
C. uvula
D. tonsils

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The tubes that carry air from the trachea into the lungs are the ________.

A. arteries
B. nares
C. veins
D. bronchi

The dome-shaped muscle under the lungs is the ________.

A. palate
B. diaphragm
C. hiatus
D. esophagus

The membrane around the lungs is the ________.

A. peritoneum
B. mucosa
C. pleura
D. mediastinum

The gas that is supplied to tissues by the respiratory system is ________.

A. oxygen
B. neon
C. sulfur
D. carbon dioxide