Embryology Flashcards
1
Q
five stages of lung embryology
A
- embryonic
- pseudoglandular
- canalicular
- saccular
- alveolar
2
Q
time period of the embryonic stage
A
26 days - 6 weeks
3
Q
events in the embryonic stage
A
respiratory diverticulum forms and initial branching
4
Q
time period of pseudoglandular
A
6 - 16 weeks
5
Q
events in the pseudoglandualr phase
A
14 branches, terminal bronchioles formed
6
Q
time period of canalicular
A
16- 28 weeks
7
Q
events in the canalicular stage
A
respiratory bronchioles and alveolar ducts
8
Q
time period of the saccular stage
A
28 - 36 weeks
9
Q
events in the saccular phase
A
terminal sacs and capillaries established
10
Q
time period of the alveolar stage
A
36 weeks +
11
Q
events in the alveolar stage
A
alveoli mature
12
Q
which germ layer does the respiratory diverticulum come from?
A
endoderm
