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。
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。
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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