Talk:Rat Development Stages: Difference between revisions
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| Somites 1-4 (occipital); pendant with 3 cavities: ectochorionic cyst, exocoelom, and amniotic cavity; ectochorionic cyst collapsing; allantoic stalk projects into exocoelom; embryo bent dorsally | | Somites 1-4 (occipital); pendant with 3 cavities: ectochorionic cyst, exocoelom, and amniotic cavity; ectochorionic cyst collapsing; allantoic stalk projects into exocoelom; embryo bent dorsally | ||
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Revision as of 13:16, 7 September 2011
1 | 1 | 1 | 0.07 | 1 cell (in oviduct) | |
2 | 2 | 0.08 x 0.06 | 2 cells (in oviduct) | ||
3 | 3 | 0.08 x 0.05 | 4 cells (in oviduct) | ||
4 | 3.25 | 8-12 cells (in oviduct) | |||
5 | 2 | 3.5 | 0.08 x 0.04 | Morula (in uterus) | |
6 | 4 | (0.08 x 0.03) | Early blastocyst (in uterus) | ||
7 | 5 | (0.12 x 0.05) | Free blastocyst (in uterus) | ||
8 | 6 | (0.28 x 0.07) | Implanting blastocyst, with trophoblastic cone and inner cell mass; outgrowth of endoderm (hypoblast) | ||
9 | 6.75 | Diplotrophoblast; inner cell mass (pendant), covered with endoderm | |||
10 | 7.25 | (0.3 x 0.1) | Near complete implantation; pendant begins differentiation into embryonic and extra-embryonic parts | ||
11 | 7.75 | (0.5 x 0.1) | Completion of implantation; primary amniotic cyst; ectoplacental cone | ||
12 | 8.5 | (1.04 x 0.26) | Connecting ectochorionic and amniotic cavities; rudiments of amniotic folds; primitive streak; start of 3rd layer formation; blastemas of heart and pericardium | ||
13 | 9 | 1.0 | Presomite neurula; fusion of chorio-amniotic folds, chorio-amniotic stalk; neural plate; embryo bent dorsally; bud of allantoic stalk | ||
14 | 9.5 | 1.5 | Somites 1-4 (occipital); pendant with 3 cavities: ectochorionic cyst, exocoelom, and amniotic cavity; ectochorionic cyst collapsing; allantoic stalk projects into exocoelom; embryo bent dorsally |