Which of the following phenomena is most likely occurring during a child's alveolar stage of lung development?
A) Terminal alveolar sacs are developing, and surfactant production is beginning.
B) A single capillary network exists, and the lungs are capable of respiration.
C) The conducting airways are formed, but respiration is not yet possible.
D) Primitive alveoli are formed, and the bronchi and bronchioles become much larger.

Question

Quizplus · Accepted Answer

During the alveolar stage of lung development from late fetal to early childhood, a single capillary network appears, and the lungs are ready to perform respiration. The development of alveolar sacs and production of surfactant are associated with the saccular period, and formation of the conducting airways occurs during the pseudoglandular period. Formation of primitive alveoli takes place during the canalicular period.

Which of the Following Phenomena Is Most Likely Occurring During