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