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fertilization
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fertilization
- The results of fertilization are:
fusion of membranes and pronuclei of sperm and oocyte
- forms the zygote
- division of blastomeres to form the 16-cell morula (mulberry)
- compaction allows formation of tight junctions to pump fluid into the center of the morula
- forms the blastocyst
- inner cell mass (& amniotic cavity)
- Embryo
- Inner cell mass: AKA embryoblast
- embryonic stem cells derived from inner cell mass
- hypoblast
- yolk sac cavity
- extraembryonic mesoderm
- large cavities form and converge
- chorionic cavity
- large cavities form and converge
- extraembryonic mesoderm
- yolk sac cavity
- epiblast
- amnioblasts
- amniotic cavity
- surrounded by chorionic cavity
- amniotic cavity
- amnioblasts
- outer cell mass
- trophoblast
- fetal contribution-->placenta
- cytotrophoblast (inner layer)
- extraembryonic mesoderm
- lines the cytotrophoblast and amnion
- chorionic plate
- connecting stalk
- the only place where embryonic mesoderm traverses the chorionic cavity
- umbilical cord
- connecting stalk
- extraembryonic mesoderm
- syncytiotrophoblast (outer layer)
- human chorionic gonadotropin (hCG)
- pregnancy tests
- human chorionic gonadotropin (hCG)
- primary villi
- cells of cytotrophoblast proliferate and penetrate into the syncytiotrophoblast and are surrounded by synctium
- flatten to for epithelial wall of blastocyst
- trophoblast
- inner cell mass (& amniotic cavity)
- forms the blastocyst
- compaction allows formation of tight junctions to pump fluid into the center of the morula
- division of blastomeres to form the 16-cell morula (mulberry)
- forms the zygote
restoration of diploid number of chromosomes
determination of chromosomal sex
initiation of cleavage
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- Mind Map on fertilization, created by mccallkb on 26/07/2014.
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- mccallkb
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