Contraction of the diaphragm and the muscles Between the ribs draw air into the lungs through the trachea, which splits into two primary Bronchi, one per lung.

横膈膜以及肋骨间肌肉的收缩把空气通过气管吸入肺内，气管分成两根主支气管分别通向两侧的肺。

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The air then passes through the larynx and down the trachea. The trachea splits into two tubes, called the primary bronchi. One bronchus passes into each lung.

接着空气通过喉下至气管，气管分为两根，称为主支气管，每一根主支气管通入一叶肺。

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