The fetal circulation differs from adult circulation because three of the fetal organ systems do not fully function until birth. These three organ systems are the

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The three fetal organ systems that do not fully function until birth are the respiratory, urinary, and digestive systems. The respiratory system doesn't function in gas exchange because the fetus receives oxygen and expels carbon dioxide through the placenta. The urinary system is developing but the fetus does not need to filter its own blood or produce urine in the same way it will after birth, as waste products are handled by the mother's body. The digestive system is not in use because the fetus receives nutrients directly through the umbilical cord.

The Fetal Circulation Differs from Adult Circulation Because Three of the Fetal