The fetus is dependent on the mother for nourishment and oxygen. These substances are transferred from the mother’s blood to the fetus’s blood inside the placenta, an organ attached to the uterus and connected to the fetus by the umbilical cord. About 600 ml (1.1 pints) of maternal blood passes through the placenta every single minute, carrying a continuous supply of nutrients.
From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.
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