Embryology Flashcards Preview

Respiratory > Embryology > Flashcards

Flashcards in Embryology Deck (10)
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1
Q

When is the embryonic stage?

A

26 days - 6 weeks

2
Q

What occurs during the embryonic stage?

A

Respiratory diversticulum forms

Initial branching to give lungs, lobes and segments

3
Q

When is the pseudoglandular stage?

A

6-16 week

4
Q

What occurs during the pseudoglandular stage?

A

14 more generations of branching: terminal bronchioles

5
Q

When is the canalicular stage?

A

16-28 weeks

6
Q

What occurs during the canalicular stage?

A

Terminal bronchioles develop into 2 respiratory bronchioles which develops into 3-6 alveolar ducts

7
Q

When is the saccular stage?

A

28-36 weeks

8
Q

What occurs during the saccular stage?

A

Terminal sacs form, capillaries establish close contact

9
Q

When is the alveolar stage?

A

36 weeks - early childhood

10
Q

What occurs during the alveolar stage?

A

Alveoli mature