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Why will the segment of lung tissue cut from the fetal pig sink when placed in water?
Wiki User
∙ 12y ago
Healthy lung tissue from an adult pig will float in formalin because there is a (relatively) large volume of air trapped in the alveolar sacs. Fetal pigs haven't taken a breath yet, so there is no air in the alveolar sacs. This is why the lung tissue from a fetal pig will sink in formalin.
Incidently, this is also how medical examiners can determine if a child was stillborn or was born alive and then died - check to see if a section of lung from autopsy floats in the formalin.
Wiki User
∙ 12y ago
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Yes, the aveloar sacs have not been inflated w/ air as the pig has never taken a breath. Niki C
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