TY - CHAP M1 - Book, Section TI - Neonatal Respiratory Physiology A1 - Rawtani, Nina A1 - Ved, Sudha A2 - Freeman, Brian S. A2 - Berger, Jeffrey S. PY - 2016 T2 - Anesthesiology Core Review: Part Two Advanced Exam AB - Lung development is separated into several phases starting at the embryonic stage. This state begins several weeks into conception and is the formation of the lung bud and initial branches of the airways. The lung is a foregut derivative and is recognizable at 25 days of conception as the laryngotracheal groove. If this groove fails to close, it can lead to tracheoesophageal fistulas. The lung divides into the five primordial divisions (two on the left, three on the right) during this stage. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1135742165 ER -