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Quiz: Life's Greatest Miracle

Teacher: Dr. Tamar
Across
Fat that forms a sheath over neuron axons
Outermost layer from which skin develops
Inner layer of embryo from which lungs develop
Central layer of the embryo from which bones develop
Zygote that has the form of a sphere
Toxins in the environment that could harm fetus
Down
Stage of germinal period
____tube. The nervous system develops from this.
Male sex hormones
Serves as a relay station between mother and fetus
STD that can affect major organs