Does the parathyroid arise from neural crest (ectoderm), mesoderm, or endoderm?

Does the pia arise from neural crest (ectoderm), mesoderm, or endoderm?

Does the spleen arise from neural crest (ectoderm), mesoderm, or endoderm?

Does the thymus arise from neural crest (ectoderm), mesoderm, or endoderm?

What five things arise from neuroectoderm?

What four things arise from surface ectoderm?

What induces the ectoderm to form the neuroectoderm (neural plate)?

What is the target antigen for neuroectodermal tumors?