Chapter 5-6 Answer Key

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Across
  1. 2. Splitting of sheets of embryonic tissues.
  2. 3. turning of embryonic surface cells inward.
  3. 6. meaning “beyond” and “form”.
  4. 7. helps to mobilize the yolk.
  5. 9. nutrition that the embryo receives from the yolk.
  6. 13. features grow at a slower rate.
  7. 19. meaning “nerve” and “formation”.
  8. 21. lacks enamel, dentin, and a vascular bone layer.
  9. 22. thought to respond to tactile stimulation.
  10. 24. release of milk from mammary glands.
  11. 27. compressed keratinized projections.
  12. 28. release of the ovum from the ovary.
  13. 29. meaning “gut” and “formation”.
  14. 33. nutrition embryo receives through the placenta.
  15. 35. A type of mineralization involving calcium
  16. 36. U-shaped and open at the heel
  17. 37. enlarged keratinized plates
  18. 38. an abrupt transformation of an organism.
  19. 40. meaning “tissue formation”.
  20. 42. the skin forms proteins, especially keratin.
Down
  1. 1. meaning “child” and “form”.
  2. 4. An indentation or infolding of the surface.
  3. 5. act of giving birth via viviparity.
  4. 8. the loose confederation of cells.
  5. 10. meaning “live” and “birth”.
  6. 11. it is a composite organ.
  7. 12. eggs yolk stores are concentrated at one pole.
  8. 14. meaning “organ” and “formation”.
  9. 15. an egg in which the yolk is in the cytoplasm
  10. 16. an early cessation of somatic development.
  11. 17. absent from lamprey skin.
  12. 18. a transport form of yolk formed in liver.
  13. 20. meaning “egg” and “birth”.
  14. 23. contains the pigment melanin.
  15. 25. composed of concentric rings or circuli
  16. 26. the deposition of hydroxyapatite
  17. 30. contains light-reflecting,
  18. 31. mitotic furrows pass through in entire zygote.
  19. 32. stationed beneath the guard hairs.
  20. 34. the act of laying eggs.
  21. 39. Loss of physical vigor
  22. 41. cells may migrate to the interior of the embryo.