Respiratory - Embryology Flashcards
1
Q
What are the lungs a derivative of?
A
Derivative of the foregut. Outpouching of oesophagus.
This forms a respiratory diverticulum with lung buds.
5th week —> Lungs buds enlarge to form left and right main bronchi.
2
Q
List the stages of respiratory development
A
Embryonic, pseudoglandular, cannalicular, alveolar
3
Q
What is produced during the alveolar stage?
A
Alveolar sacs, T1 and T2 pneumocytes.
4
Q
When is surfactant produced?
A
From 34 weeks, with a dramatic increase pre-birth
5
Q
Why so premature babies have low levels of surfactant?
A
Because they miss the dramatic increase pre-birth/the beginning of surfactant production at 34 weeks.
6
Q
How are premature babies treated for low surfactant levels?
A
Given replacement surfactant.
