Slides: Implantation and Embryonic & Fetal Development.

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Presentation transcript:

Slides: Implantation and Embryonic & Fetal Development

1 pronuclei Zona

2 Polar Body Blastomere

3 Zona Blastomeres

4 Zona Blastomeres early blastocyst ‘hatching’ from zona Zona degrading

5 Inner Cell Mass Trophoblast Blastocyst

6 uterine gland endometrium implanting conceptus

7 syncytiotrophoblast lacunae embryonic disc

8 lacunar networkamnionembryonic disc yolk sac cytotrophoblast

9 lacunar networkamnionembryonic disc yolk sac chorion

10 intervillous space = lacunar network connecting stalkembryonic disc yolk sac chorionchorionic villi

11 epiblast mesoderm endoderm The Embryonic Disc

12 primitive streak connecting stalk embryonic disc yolk sac chorion

13 amnion ectoderm endodermnotochord mesoderm

14 brain connecting stalk umbilical cord somites yolk sacchorion heart pharynx

15 umbilical cord amnion forebrain yolk sac heart pharyngeal arches somites

16 apical ectodermal ridge (AER) Limb bud limb mesoderm

17 umbilical cord amnion yolk sacchorionic villi

18 amnion umbilical cord umbilical hernia: intestines Crown-Rump length 30 mm = 1.25 inch

19 Placenta = villous chorionamnionsmooth chorion Crown-Rump length: 93 mm = 3.5 inches