alveolar period of lung development

alveolar period of lung development

the period (32 weeks after fertilization-8 years) when the epithelial lining of the terminal saccules is extremely thin so that capillaries bulge into them; characteristic mature alveoli do not form until after birth.

al·ve·o·lar pe·ri·od of lung de·vel·op·ment

(al-vē'ŏ-lăr pēr'ē-ŏd lŭng dĕ-vel'ŏp-mĕnt)
The period (32 weeks-8 years) when alveoli develop; characteristic mature alveoli do not form until after birth.