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The small ball of cells that is the embryo from the first couple days after conception to about three weeks after conception. The blastocyst attaches to the uterus wall of the embryo’s mother, then begins to develop into the three germ layers that will form the entire body of the animal.
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Blastocyst Term Timeline in Your Inner Fish
The timeline below shows where the term Blastocyst appears in Your Inner Fish. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 6: The Best-laid (Body) Plans
...the first few days, the embryo is just a spherical clump of cells called a blastocyst. The blastocyst implants to the wall of the mother’s uterus and cells start to rapidly...
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Von Baer’s three germ layers are named for their position in the blastocyst. The ectoderm is the outer layer that forms the outside of the body (skin) and...
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