Module 2.4 Vocab Terms

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Across
  1. 4. the organ that provides nourishment, immune protection, and oxygen to the embryo
  2. 8. four structures that develop as attachments to the embryo and help support it
  3. 10. the second major phase of embryonic development
  4. 14. when cells go through meiosis to form gametes
  5. 16. a series of rapid cell divisions that produces a multicellular ball
  6. 17. a hollow ball of cells that form at the completion of cleavage
  7. 19. forms part of the umbilical cord
  8. 20. a fertilized egg
Down
  1. 1. a hollow sphere of cells that the embryo forms into
  2. 2. the process of combining the male gamete with the female gamete
  3. 3. forms the outer layer of the gastrula
  4. 5. a reproductive cell of a plant or animal
  5. 6. the process of sperm cell development
  6. 7. forms an embryonic digestive tract
  7. 9. produces the embryo's first blood cells
  8. 11. the process of the formation of female gametes
  9. 12. an outer layer of cells that secretes enzymes that enable the blastocyst to implant in the uterine lining
  10. 13. lies between the ectoderm and endoderm
  11. 14. a three-layered stage that an embryo is organized into during gastrulation
  12. 15. a process where one cell divides twice to create four cells with half the amount of genetic information
  13. 16. the outermost extraembryonic membrane
  14. 18. grows to enclose the embryo