Neuroectoderm

The neuroectoderm is in embryonic development from the outer germ layer ( ectoderm ) derived form. From it evolved the central, as well as the peripheral nervous system. Similarly, the secretory cells of the neuroendocrine glands that are scattered in various organs and tissues throughout the body originate ( diffuse neuroendocrine system, Dnes ) from the neuroectoderm. This secretory cells produce hormones or neurotransmitters, and are also referred to as APUD cells.

The Dnes consists of an evolutionary view of three groups:

• With neuroectodermal origin: hypothalamus, parathyroid, pituitary gland.
• Distribute thyroid, adrenal medulla, melanoblasts of the skin cells of the urogenital tract, serotonin: originating in the neural crest.
• Controversial origin cells are islets of Langerhans of the pancreas.

Neuroectodermal tumors

From the neuroectoderm also malignant tumors can be derived. These include, for example, Ewing's sarcoma that can be regarded as peripheral neuroectodermal tumors, primitive neuroectodermal tumors, and in the central nervous system.

• Organogenesis
• Developmental Biology