A Embryonic Development

Give the name of the structure that the phrase describes.

_ 1. The name of the ovulated structure prior to fertilization

_ 2. The blastocyst structure that becomes the embryo

_ 3. The anatomical structure where fertilization normally takes place

_ 4. The stage of the embryo that implants in the uterine wall

_ 5. After fertilization, implantation normally occurs on this day

_ 6. The membrane that forms the embryonic side of the placenta

_ 7. The structure that is formed after the morula stage

_ 8. The structure that the blastocyst sheds before implantation

_ 9. The structure that forms the maternal side of the placenta

_10. The name of the thin, protective membrane that encompasses the embryo

_11. The side of the placenta that is smooth and shiny

_12. The number of umbilical arteries in the umbilical cord

_13. The number of umbilical veins in the umbilical cord

_14. This placental structure has villi

_15. The number of primary germ layers that form all body organs

_16. Sustains the embryo with nutrients and removes wastes

_17. The name of the female gamete

. 18. The name of the male gamete

. 19. The inner layer of the uterus where implantation occurs. 20. The name of the fertilized egg

. 21. Primary germ layer that becomes the outer skin and nervous system

. 22. Primary germ layer that gives rise to epithelial lining of digestive and respiratory organs

. 23. Primary germ layer that produces bone, muscle, cartilage, and blood

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