Embryology

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Author:
kris10leejmu
ID:
175523
Filename:
Embryology
Updated:
2012-10-04 13:11:04
Tags:
Clinical Practice ll
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Description:
Clinical Practice ll
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  1. What is embryology?
    the study of the development of an animal from the fertilized egg until the organs are formed (fetus).
  2. What is the purpose of the yolk?
    nutrition of the early embryo.
  3. Do just bird eggs have yolks?
    no.  mammalian eggs do, too
  4. What is a zygote?
    • a fertilized egg
    • egg + sperm
  5. What is a fetus?
    an animal from the time organ systems are developed until the time it is born
  6. Rapid division of the zygote is called _____.
    cleavage
  7. Name the solid mass of cells formed from the zygote by cleavage.
    morula
  8. As the embryo continues to grow, it develops into a hollow ball of cells called the _____.
    blastula
  9. The placenta is formed from _____ tissue.
    fetal
  10. What is implantation?
    attachment of the embryo to the uterine wall
  11. Further growth of the blastula results in development of three embryonic germ layers.  List these three layers and briefly describe their relative locations.
    • ectoderm:  outer layer
    • mesoderm:  middle layer
    • endoderm:  inner layer
  12. Define epithelium.
    covering of internal and external surfaces of the body
  13. Define mesenchyma.
    embryonic connective tissue
  14. Define carcinoma.
    malignant tumor derived from ectoderm and endoderm tissue
  15. Define sarcoma.
    malignant tumor derived from mesenchymal tissue
  16. Define blastoma.
    neoplasm composed of embryonic cells.
  17. What structures are considered to be endothelium?
    lining of heart, lining of blood and lymph vessels, lining of body cavities - pleura, peritoneum, pericardium
  18. What layer is nervous tissue?
    ectoderm
  19. What layer is lymphoid tissue?
    mesoderm
  20. What layer is muscle?
    mesoderm
  21. What layer is the inner lining of the intestines - mucosa?
    endoderm
  22. What layer is hair?
    ectoderm
  23. What layer is the inner lining of lungs?
    endoderm
  24. What layer is bone?
    mesoderm
  25. What layer is skin?
    ectoderm
  26. What layer is the dentin of teeth?
    mesoderm
  27. What layer is the enamel of teeth?
    ectoderm
  28. What is another word for ovum?
    egg
  29. What is another word for morus?
    mulberry
  30. What is another word for karkinos?
    crab
  31. What is another word for sarkos?
    flesh
  32. What does "meso-" mean?
    middle
  33. What does "blasto-" mean?
    bud, shoot, early stage of growth
  34. What does "germ-" mean?
    bud, shoot, early stage of growth

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