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It is exchanged in the same place as the mother. Carbon dioxide is exchanged in the lungs. The fetal blood is cared for in the body by the umbilical cord and the blood is filtered by the mothers organs and her lungs. Such is a strong reason never to smoke, drink or do drugs during pregnancy. Cord blood is extremely rich and full of good things for the child later in life if he or she gets sick. That is why you see ads on television for Cord Banks now.

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14y ago
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15y ago

Lungs in mammals and humans. Tracheae in insects. Gills in aquatic organisms.

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13y ago

That takes place in the placenta.

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Q: What organ exchanges oxygen and carbon dioxide?
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