Examlex
If you conduct a study and predict that X causes Y, then X is the ____ variable.
Umbilical Cord
A flexible cord-like structure containing blood vessels and attaching a mammal fetus to the placenta during gestation.
Extraembryonic Membrane
Membranes outside the embryo that contribute to the developing embryo's life support system in various ways, such as gas exchange and waste management.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to and removing waste from the developing fetus through the umbilical cord.
Human Embryo
The early developmental stage of humans following conception and prior to fetal development.
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