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A Human Embryo of Carnegie Stage 12
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- Authors
- Issue Date
- 1992-03
- Citation
- Seoul J Med, Vol.33 No.1, pp. 87-95
- Keywords
- Embryo ; Carnegie stage
- Abstract
- A human embryo obtained from a salpinx removed for the treatment of
tubal gestation was serially sectioned and observed. On gross examination, the embryo
showed three prominent pharyngeal arches, but not the cervical sinus. The upper arm
bud had just begun to appear with a slight elevation in the skin ectoderm. Both the anterior
and posterior neuropores had already been closed. The heart was at the cardiac
loop stage. The respiratory diverticulum, the dorsal pancreas and the beginning of the
omental bursa had appeared. In the pharyngeal region, the adenohypophyseal pocket
and the thyroid anlage were observed. The optic evagination showed no regional differentiation
yet. From the above findings, we concluded that this embryo belonged to
Carnegie stage 12.
- ISSN
- 0582-6802
- Language
- English
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