Chapter 5

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Across
  1. 1. Collection of cells with similar structure and function and the substances between the cells.
  2. 4. The development or development history of an individual organism.
  3. 9. Bone that is denser and has fewer spaces than spongy bone.
  4. 10. Addition of extra stages beyond adult stage of ancestor.
  5. 15. A vertebrate whose embryo lacks an amnion.
  6. 16. The outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals (including humans), it contributes to the formation of the placenta.
  7. 17. Gland that secretes to a surface or outward through a duct.
  8. 18. The formation of endoderm by the splitting of the blastoderm into two layers of cells.
  9. 22. The study of relationships among different groups of organisms and their evolutionary development.
  10. 23. The sheet of fibrous connective tissue around bone.
  11. 25. A saclike membrane that holds the developing embryo in a compartment of water.
  12. 26. The formation or development of tissue from the undifferentiated cells of the germ layers of the embryo.
  13. 28. Restrictive or permits no relative movement.
  14. 31. Formation of organs during embryonic development.
  15. 34. Used in embryo development and are active in different zones of the embryo and control what body part will develop in different parts of the embryo.
  16. 36. States that the development of an organism proceeds from the general to the special and embryos belonging to various classes closely resemble one another in their earlier stages but diverge more and more as development proceeds.
  17. 38. Father of Embryology.
  18. 39. Mature bone cell surrounded by bone matrix.
  19. 40. Single-celled,diploid product of fertilization, resulting from the union of a sperm cell and an oocyte.
Down
  1. 2. Joint permits considerable movement.
  2. 3. An abrupt transformation from one anatomically distinct stage (juvenile) to another (adult).
  3. 5. Firm,smooth, resilient,nonvascular connective tissue.
  4. 6. Retention of juvenile features in adult.
  5. 7. States that each embryo's developmental stage represents an adult form of an evolutionary ancestor.
  6. 8. A specialized type of calcification,unique to vertebrates, involving the deposition of hydroxyapatite (calcium phosphate) in the organic matrix leading to bone formation.
  7. 11. Consists of a record of the chemical changes to the DNA and histone proteins of an organism.
  8. 12. A specialized type of mineralization wherein calcium carbonate (invertebrates) or calcium phosphate (vertebrates) is deposited in the organic matrix.
  9. 13. Composed of specialized cells which not only receive stimuli but also conduct impulses to and from all parts of the body.
  10. 14. Bone with a lattice-like appearance.
  11. 19. An extraembryonic extension of the hindgut of amniote embryos that functions in excretion and sometimes in respiration.
  12. 20. Cell that makes bone.
  13. 21. The sheet of fibrous connective tissue around cartilage.
  14. 24. Covers the body surface and forms the lining for most internal cavities.
  15. 27. A specialized connective tissue in which calcium phosphate and other organic salts are deposited in the matrix.
  16. 29. A highly vascular endodermal layer surrounding the yolk of an embryo.
  17. 30. A general process wherein various inorganic ions are deposited in the organic matrix of tissues to harden them.
  18. 32. Perform a variety of functions including support and protection.
  19. 33. A vertebrate whose embryo is wrapped in an amnion.
  20. 35. Ductless gland that secretes internally, usually into the circulatory system.
  21. 37. Cell that digests and removes bone.