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Blastocyst

Blastocyst

in mammalian development, cleavage produces a thin walled hollow sphere, whose wall is the trophoblast, with the embryo proper being represented by a mass of cells at one side. The blastocyst is formed before implantation and is equivalent to the blastula.


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which mechanism triggers the first cell differentiation?

... days after fertilization and after several cycles of cell division, these cells begin to specialize, forming a hollow sphere of cells, called a blastocyst but do not explain why they begin to specialize. I could imagine ⋅ that a cell has a "counter" on the number of divisions ...

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by WoJ
Mon Jul 22, 2013 6:18 pm
 
Forum: Cell Biology
Topic: which mechanism triggers the first cell differentiation?
Replies: 4
Views: 2705

How long can they live outside the body?

Dear everyone: As l read from the web, it says that a human sperm can live in open air at about four hours. But how about embryo/zygote/blastocyst? Can they live outside the body, in open air for a while of time???

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by sonofthe
Sat Feb 25, 2012 8:45 am
 
Forum: Cell Biology
Topic: How long can they live outside the body?
Replies: 2
Views: 2572

Question on Chromatids

... 2-cell stage, is not known to me. (Anybody else know about this on the forum?) It would be interesting though to see if there is a cell within the blastocyst (ICM - InnerCellMass - for humans) that contains all the original paternal and maternal genome. Why would you pick the original cell to become ...

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by kolean
Tue Dec 21, 2010 3:04 pm
 
Forum: Cell Biology
Topic: Question on Chromatids
Replies: 1
Views: 2147

H2O +Food ---> Zygote

... yolk that supplies the nutrients to the fertilized egg. But actually nutrients for the zygote is all contained in the fertilized egg cell till the blastocyst stage (the cell is just being divided into individual cells - DNA duplication and cytokinesis). Upon gastrulation, then development needs ...

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by kolean
Sun Jun 20, 2010 11:26 pm
 
Forum: Cell Biology
Topic: H2O +Food ---> Zygote
Replies: 7
Views: 4368

Re: 5 questions about cell biology

... used to treat disease in present? A.Bone Marrow Stem Cell B.Mesenchymal Stem Cell C.Pherripheral blood stem cell D.Umbilical cord blood stm cell E.Blastocyst Embryotic stem cell May be D 4.Which disease shoukd not be treated by cell-based therapy? A.HIV B.burns C.Diabetes Millitus D.Spinal cord ...

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by ATPenergy
Sat Feb 20, 2010 2:14 am
 
Forum: Cell Biology
Topic: 5 questions about cell biology
Replies: 6
Views: 5294
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