8 St 14 Jul 2003 Jahr - Baby's lungs develop
Beschreibung:
your baby's lungs are beginning to produce surfactant, the substance that allows the air sacs in the lungs to inflate — and keeps them from collapsing and sticking together when they deflate.
Zugefügt zum Band der Zeit:
Datum:
8 St 14 Jul 2003 Jahr
Jetzt
~ 20 years ago