QuestionSBA
QuestionChoice
This is within the terminal sac stage; however, it begins 2 weeks earlier at week 26
10026870
e
Week 28
QuestionChoice
This is the beginning of the canalicular stage where terminal bronchioles divide into respiratory bronchioles and primitive alveoli begin to form
10026867
b
Week 16
QuestionChoice
This is the beginning of the pseudoglandular stage where bronchial buds begin to differentiate and tertiary bronchi begin to form
10026868
c
Week 5
QuestionChoice
This is the beginning of the terminal sac stage. Type I pneumocytes are in direct contact with the capillary bed and type II pneumocytes secrete large volumes of surfactant
10026866
a
Week 26
QuestionChoice
This is when the alveolar stage begins and the number of adult alveoli increases. This continues until the child is around 8 years old
10026869
d
Week 36
Concept
Chapter
2693
4533
Development of the lungs
Topic
171
Embryology
17771
Premature babies are at risk of having too little surfactant in their lungs. Surfactant is produced by type II pneumocytes which develop during the terminal sac stage.

At what week does the terminal sac stage begin?
a