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