Biology 11: Immune System and Disease Worksheets
Surfactant is a fatty, lipid-based molecule produced by the cuboidal alveolar cells that decreases the surface tension of the thin film of water coating the inside of each alveolar sac to prevent the alveoli from collapsing in between each breath. Surfactant does not develop in sufficient amounts in a fetus until late in pregnancy (28-30 weeks). ................
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