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Development of the Respiratory System by ScribdTranslations is a document available to read on EtoBox.
1) The respiratory system develops from a groove in the primitive pharynx that deepens to form the respiratory diverticulum; 2) The diverticulum elongates to form the trachea while dividing into two buds that will give rise to the lungs; 3) The lungs continue to branch and become vascularized until birth, when the first breath occurs and the surfactant produced prevents the collapse of the alveoli.
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