Embryology Embryogenesis and Blastogenesis
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Questions and Answers

What term is used for the development of new individuals by means of asexual reproduction?

  • Cleavage
  • Organogenesis
  • Blastogenesis (correct)
  • Gametogenesis
  • Which phase of ontogenic development involves the formation of body structures and organs?

  • Gametogenesis
  • Cleavage
  • Organogenesis (correct)
  • Gastrulation
  • What marks the end of the embryonic period in ontogenic development?

  • Organ formation (correct)
  • Fertilization
  • Gastrulation
  • Cleavage
  • Which term refers to the development and maturation of sex cells called gametes?

    <p>Spermatogenesis</p> Signup and view all the answers

    During which period do organs grow and begin to function in ontogenic development?

    <p>Fetal period</p> Signup and view all the answers

    What is defined as the time from fertilization to the earliest stages of organ development?

    <p>Embryonic period</p> Signup and view all the answers

    What is the main difference between centrolecithal and telolecithal ova?

    <p>The distribution of yolk in the egg</p> Signup and view all the answers

    What is the morphology of a morula?

    <p>Solid ball of blastomeres</p> Signup and view all the answers

    In mammalian blastocysts, what are the two populations of cells present?

    <p>Inner cell mass and trophoblast</p> Signup and view all the answers

    What is the composition of the avian blastoderm in terms of areas?

    <p>Area pellucida and area opaca</p> Signup and view all the answers

    During blastogenesis, what morphogenic process gives rise to the three germ layers?

    <p>Gastrula</p> Signup and view all the answers

    Which cells give rise to the body of the embryo, yolk sac, and allantois in blastogenesis?

    <p>Inner cell mass</p> Signup and view all the answers

    What is the role of the notochord in the embryonic development process?

    <p>Induces formation of the head process</p> Signup and view all the answers

    Which structure marks the location of the future vertebral column and base of the cranium?

    <p>Notochord</p> Signup and view all the answers

    What is the adult fate of the notochord in embryonic development?

    <p>Nucleus pulposus of intervertebral discs</p> Signup and view all the answers

    Which layer of cells in blastogenesis later forms the yolk sac?

    <p>Hypoblast</p> Signup and view all the answers

    What induces overlaying ectoderm to become neuroectoderm to form the neural plate?

    <p>Notochord</p> Signup and view all the answers

    Which structure undergoes cavitation to give rise to body cavities in blastogenesis?

    <p>Somatic mesoderm</p> Signup and view all the answers

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