Embryo Develoment
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Embryo Develoment

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  • Interesting info about Embryonic Development. Such presentations can be used by medical workers, students and ordibary pregnant woman.
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Embryo Develoment Presentation Transcript

  • 1. Early Embryonic Development
  • 2.
    • Define these terms …
    • Ovary
    • Fallopian tube
    • Uterus
    • Fertilization
    • Zygote
    • Cleavage
    • Morula
    • Blastula (Blastocyst)
    • Implantation
  • 3. What is a blastocyst?
  • 4.
    • During the second week, cells in the wall of the blastocyst will begin to fold inward.
    • Consequence of gastrulation :
    • A hole is now present on the side of the blastocyst – it is called the blastopore .
    • Cell layers are formed in the gastrula .
    • The innermost layer of cells is called the endoderm .
    • The middle layer of cells is called the mesoderm .
    • The outer layer of cells is called the ectoderm .
    • Cells are becoming specialized. Cell differentiation is occuring – they are becoming differentiated. They are changing from undifferentiated  differentiated
  • 5.  
  • 6.
    • In vertebrates, Gastrulation is followed by Neurulation … the development of the nervous system. (change in body symmetry)
  • 7.
    • By day 21, embryonic membranes have also formed:
    • The Amnion  develops into a fluid filled sac. (cushions and protects baby)
    • The Chorion  along with the lining of uterus forms the Placenta , the embryo’s organ for respiration, nourishment, and excretion. (The placenta allows the embryo to make use of the mother’s organ systems while its own are developing.)
  • 8.
    • Materials diffuse between baby and mother – there is no direct blood link between the two…
    • Umbilical cord – attached to baby and placenta
  • 9.  
  • 10.