First breath Flashcards
4 stages of lung development
Embryonic
Pseudoglandular
Cannalicular
Alveolar
Where do the Lungs derive from?
The foregut
Where does the Respiratory Diverticulum come from?
The Oesophagus
When is the Pseudoglandular stage in Lung development?
Weeks 5-17
What develops during the Pseudoglandular phase?
The conducting airways
When is the Cannalicular phase?
16-25 weeks
What forms during the Cannalicular phase of Lung development?
Capillaries, Vasculature and Alveoli
When does the Alveolar phase occur in lung development?
25 Weeks-term
What forms during the Alveolar stage?
Alveolar sacs
Type 1 and Type 2 pneumocytes
What age do the Alveoli continue to develop until?
age 5
What week is Surfactant produced from?
Week 34
Why is the Lung not useful in the Foetus?
Filled with fluid
What does the Ductus Arteriosus connect together?
Pulmonary artery and Aorta
What does the Foramen Ovale cause?
Blood to be shunted from the right to left atrium
