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Ch. 25 Prenatal Development

Across
The cord that attaches the baby to the placenta
The uniting of a sperm and ovum to form a zygote; must take place withing a few days after ovulation
The process in which the blastocyst forms the three germ layers: the ectoderm, mesoderm and endoderm
The fluid
The phase of embryo development when the zygote undergoes mitosis to produce daughter cells
Structure that consists of a portion of the uterine wall and the chorion of the embryo and allows the exchange of nutrients and waste between the mother and embryo
Down
What a baby is called after 11 weeks of prenatal development; all parts are there and functioning
The blastocyst attaches to the thickened endometrium ( in the uterus for nourishment
A fluid-filled sphere which contains a mass of cells produced by mitosis