Stage 8: Lab Manual - Horizon 8
Stage 8 Stereo Views
- Length: 1 - 1.5 mm.
- Hensons node and primary groove.
- The curved germ disc lies between a yolk sac with blood islands and a crescent shaped amniotic cavity.
- The body stalk bends back and blends with the chronic mesoblast.
- Ovulation age: 17 - 19 days.
Stage 8: Animation
Developmental Stages in Human Embryos by Ronan O'Rahilly and Fabiola Müller.
Published by Carnegie Institution of Washington, Publication 637. 1987.
Stage 8 (PDF 764 KB)
QUESTION: What occurs to the body stalk?