(Unknown)Lung Development
Stages of lung development.
1-4 months
- pseudoglandular
- precursors of bronchi branch in mesenihyme.
4-7 months
-
canalicular phase - progressive growth of capillaries to form blood air
barriers and beginning differentiation of alveolar epithelium.
Past
7 months
saccules (alveolar ducts) are present and alveoli begin to
form.
Formation of alveoli continues to age 3 or 4 years.
