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Infant Toddler Vocabulary Chapter 2

Across
Membrane that closely covers the embryo
Implants in the uterine wall
Connects a baby in the womb to its mother
Period when all major organ structures form
Innermost layer of the embryo
Middle layer of the embryo
Down
Provides oxygen and nutrients to a developing baby and eliminates waste
Begins at conception
Begins after the 10th week of development
An agent which can disturb the development of an embryo
Outer most layer of the embryo
A specialized cell that transmits nerve impulses