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and Neurenteric Canals
SIZE: 1.0 - 1.5 mm
TIME PERIOD: 17-19 days post-ovulationn
The embryonic area is now shaped like a pear, and the head region is broader than the tail end.
The ectoderm has thickened to form the neural plate. The edges of this plate rise and form a concave area known as the neural groove. This groove is the precursor of the embryo's nervous system and it is one of the first organs to develop.
By stage 8, the blood cells are already developed and begin to form channels along side of the epithelial cells forming at the same time.
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