Respiratory Flashcards
1
Q
What are the stages of respiratory embryology
A
- Embryonic
- Pesudoglandular
- Canalicular
- Saccual
- Alveolar
2
Q
Describe embryonic
A
4th week
Respiratory diverticulum - R and L bronchi
Endoderm = epithelium of the lungs
Splanchnic mesoderm = cartilages and connective tissue
3
Q
What makes epithelium of the lungs
A
Endoderm
4
Q
What makes cartilages and connective tissue
A
Splanchnic mesoderm
5
Q
Describe pseudoglandular phase
A
5-16th week
Terminal bronchioles
6
Q
Describe canalicular phase
A
16-26th week
Respiratory bronchioles
Resp. bronchioles form a few alveolar ducts
7
Q
Describe saccual stage
A
26-32 weeks
Alveolar sacs
Type 1 and type 2 pneumocytes
8
Q
Describe alveolar stage
A
32 weeks to birth
Alveolar are mature
9
Q
When does surfactant production happen
A
34 weeks gestation
10
Q
When is there a dramatic increase in surfactant produced
A
2 weeks prior to brith
