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The development of the neural tube, heart, lungs, and other internal structures begins in the embryonic stage of development, specifically during the third week of gestation. The process starts with the formation of the three germ layers: ectoderm, mesoderm, and endoderm. The neural tube forms from the ectoderm, while the heart and lungs develop from the mesoderm. These structures undergo complex processes of differentiation and organogenesis as the embryo grows.

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What is encephaloceles?

Encephaloceles refers to defects in the development of a fetal structure called the neural tube. The tube fails to close completely during development of the fetus.


What is neural tube and neural crest?

The neural tube is a structure that forms during early embryonic development and eventually develops into the central nervous system, which includes the brain and spinal cord. The neural crest, on the other hand, is a group of cells that arise from the edges of the neural tube and migrate to various parts of the body, giving rise to diverse structures such as peripheral nerves, skin pigment cells, and certain facial features. Both the neural tube and neural crest are crucial for proper neural development and the formation of the nervous system.


What is the structure in mammalian embryos that develops into the brain and spinal chord?

The neural tube is the structure in mammalian embryos that develops into the brain and spinal cord. It forms from the ectoderm layer during development and gives rise to the central nervous system.


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Are melanocytes produced from ectoderm?

Yes, melanocytes are derived from the neural crest cells, which are a transient structure that arises from the ectodermal germ layer during embryonic development.


The embryonic origin of all neural tissue?

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What structure develops into the vertebrate spinal cord?

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Which event occurs during week 4 of development?

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