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1 – the primitive node; 2 – the primitive streak; 3 – extra-embryonic mesoderm;
4 – the amnion wall; 5 – the yolk sac wall; 6 – epiblast; 7 – hypoblast; 8 - cloacal membrane; 9 – prechordal plate; 10 epidermal ectoderm; 11 – neuroectoderm;
12 – intraembryonal mesoderm; 13 – entoderm; 14 – notochord; 15 – neural tube’ primordium; 16 – somite; 17 – intermediate mesoderm (nephrotomes);
18 – parietal mesoderm; 19 – visceral mesoderm
Table 7
| Derivatives of the nerve crest |
| Sensory neurons of spinal ganglia and ganglia of cranial nerves; Neurons of the sympathetic and parasympathetic nerve system; Schwann cells and cells-satellites of ganglia; Neurohypophysis (posterior pituitary gland); Pia mater and arachnoid membrane Melanocytes; Cells of the carotoid body; Calcitonin-producing cells (parafollicular cells) of the thyroid gland; Chromaffine cells (the adrenal gland) Cartilage, bones, muscles and connective tissue of the face; Maxillary and mandibular processes; Sublingual arches and the 3-d throat arch; Odontoblasts; Corneal endothelium Dilator and sphincter pupillae muscles Ciliary muscle |
