Chapter 5: Life History

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Across
  1. 3. Loosely associated cells of mesodermal origin
  2. 4. The reproductive pattern of egg laying
  3. 7. Paedomorphosis produced by precocious onset of sexual maturity in an individual still in the morphologically juvenile stage
  4. 9. A process by which individual surface cells migrate inward to the interior of the embryo
  5. 11. A highly ordered arrangement of bone cells into concentric rings, with bone matrix surrounding a central canal through which blood vessels and nerves run
  6. 13. Birth of young not encased in a shell
  7. 14. A transport form of yolk formed in the liver of the female and carried in her blood
  8. 15. Specialized chorioallantoic placenta over the embryo for exchange of nutrients and gases
  9. 19. Pertaining to the nutrition the embryo receives through the placenta or from uterine secretions
  10. 20. The act of giving birth via viviparity
  11. 23. A urogenital duct transporting ova and often involved in protection and nourishment of the embryo
  12. 24. A single-celled lining of body cavities
  13. 26. A process by which individual surface cells migrate inward to the interior of the embryo
  14. 27. The outer portion or rim of an organ
  15. 28. A specific type of mineralization involving calcium carbonates (invertebrates) or calcium phosphates(vertebrates) in the matrix of special connective tissue
  16. 31. The spreading of surface cells during embryonic gastrulation
  17. 32. An extraembryonic extension of the hindgut of amniote embryos that functions in excretion and sometimes in respiration
  18. 34. Condensed clumps pf mesoderm
  19. 36. Within an evolutionary lineage, the change in time at which a characteristic appears in the embryo relative to its appearance in a phylogenetic ancestor
  20. 38. The outer cellular layer of the mammalian blastocyst
  21. 39. The process by which the embryo forms a distinct endodermal tube that constitutes the early gut
  22. 40. The process of forming an ectodermal tube
Down
  1. 1. A joint permitting considerable rotation of articulated skeletal elements, and characterized by a joint capsule, synovial membrane, and articular cartilages on joined elements
  2. 2. A dermal bone located under and supporting an epidermal scale
  3. 5. The observation that embryonic development is conservative in that some features of ancestral embryos are retained in embryos of descendants
  4. 6. Pertaining to an egg in which the yolk is evenly distributed throughout the cytoplasm
  5. 8. A cap of cells arched over a small blastocoel
  6. 10. The sheet of fibrous connective tissue around cartilage
  7. 12. Pertaining to eggs in which yolk stores are concentrated at one pole
  8. 16. The sheet of fibrous connective tissue around bone
  9. 17. Loose association of cells derived from neural
  10. 18. Spaces within the matrix
  11. 21. Located within the cores of teeth that secrete the inner layer of dentin also arise from neural crest cells
  12. 22. A specific type of mineralization, unique to vertebrates leading to bone formation
  13. 25. Pertaining to eggs with moderate amounts of stored yolk
  14. 29. A layer of bones matrix with its closely packed collagen fibers aligned in parallel
  15. 30. A joint through which little or no movement is permitted between articulated skeletal elements
  16. 33. Paedomorphosis produced by delayed onset of somatic development that is overtaken by normal sexual maturity
  17. 35. Pertaining to eggs with large quantities of stored yolk
  18. 37. A syncytial layer closely adhering to the uncleaved yolk