File:Stage14 bf21.jpg

Human Embryo Carnegie Stage 14

Embryo appears as Carnegie Stage 14 from ectopic pregnancy.

• Ventral view of embryo is partially enclosed in amniotic membrane.
• Larger cavity is chorionic space (coelom).
• Placental villi are visible outside chorionic membrane.
• Small sac (right) connected to umbilical region is the yolk sac.
• Vitelline blood vessels vessels can be seen in the yolk stalk connecting the yolk sac to the embryo.

Stage 14 Links: Embryo lateral view | Embryo lateral view (small) | Embryo lateral view (medium) | Embryo lateral view (large) | Virtual Slide | Embryo ventral view (small) | Embryo ventral view (medium) | Embryo ventral view (large) | Virtual Slide | Carnegie stage 14 | Week 5

Stage 14

• Week 5, 31 - 35 days, 5 - 7 mm
• Gestational Age GA week 7
• Mesoderm: continued segmentation of paraxial mesoderm (30+ somite pairs), heart prominence
• Head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum
• Body: heart, liver, umbilical, upper and early lower limb bud

Image: Dr Steven O'Connor (Houston, Texas) - Other embryo images.

Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline

Cite this page: Hill, M.A. (2024, April 20) Embryology Stage14 bf21.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage14_bf21.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G