Examlex
Which of the following statements is true?
Blastocyst
An early stage in human embryonic development, a hollow sphere of cells formed after several days of cell division following fertilization.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing baby while removing waste.
Umbilical Cord
A flexible cord-like structure connecting a fetus to the placenta, delivering nutrients and removing waste during pregnancy.
Endoderm
The inner layer of an embryonic disk, which will develop into the digestive system, liver, lungs, pancreas, salivary glands, and respiratory system.
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