The development of the respiratory system in the embryonic period of man has been carefully worked out by a number of observers and the features of the process are well known. On the other hand, the development of this system from the third fetal month to birth, in early infancy, later infancy and childhood has received little attention. The present report is a study of the topographic relationships of the larynx, trachea and lungs, with especial emphasis on the changes in this relationship during the entire developmental period. All the available data on the subject, for infancy, childhood and adult life, have been correlated with my findings in the fetus, the new-born infant and the child. It is hoped that in this way a picture may be sketched of the relation of the parts of the respiratory system to the vertebral column, beginning with early fetal life and ending with
NOBACK GJ. THE DEVELOPMENTAL TOPOGRAPHY OF THE LARYNX, TRACHEA AND LUNGS IN THE FETUS, NEW-BORN, INFANT AND CHILD. Am J Dis Child. 1923;26(6):515–533. doi:https://doi.org/10.1001/archpedi.1923.04120180014002
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