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ectoderm, junction of neural ectoderm and surface ectoderm, neural groove, neural plate, primitive streak

A section through the caudal tip of the embryo.

Observe:
1. The primitive streak where mesodermal cells are being formed.
2. The neuroectodermal junction where the neural plate is in contact with ectoderm.


Keywords: ectoderm, junction of neural ectoderm and surface ectoderm, neural groove, neural plate, primitive streak

Source: Atlas of Human Embryos.