I hope this helps <span>In comparison with the development of the other organs the prenatal development of the lungs occupies a special position. The lungs as breathing organs are unnecessary for intrauterine existence. Nevertheless, they must be developed to such an extent that they are immediately ready to function </span>following birth<span>. This explains why the entire development extends from the </span>embryonic period<span> through the </span>fetal period<span> up to birth (and even afterwards). During intrauterine life, the lungs are nevertheless an </span>important source<span> of </span>amniotic fluid<span>. Daily, ca. 15 ml per kg of body weight is produced that flows out via the trachea and mouth or is swallowed.</span>
