関連ワード:
how does the throat work in the respiratory system how does the diaphragm work in the respiratory system how does the trachea work in the respiratory system how does the larynx work in the respiratory system how does the pharynx work in the respiratory system how does the bronchi work in the respiratory system how does the windpipe work in the respiratory system how does the voice box work in the respiratory system how does the bronchioles work in the respiratory system how does the respiratory system work step by step
