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Concrete operational thinkers can conserve, but they are still unable to use transformational thought.
Umbilical Cord
A flexible cord-like structure connecting a fetus to the placenta, supplying oxygen and nutrients while removing waste.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to and removing waste from the fetus through the umbilical cord.
Blood
A vital fluid in humans and animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to growing babies while removing waste products from the baby’s blood.
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