Hansen node
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Developmental structures
Articles
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ventral node
7 March 2007 -
fetal lungs
17 November 2004See also
fetal lung 18 weeks
fetal lung 22 weeks -
embryo
21 May 2004human embryo
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Neural tube
8 March 2007Pathology
neural tube defects
Videos
neural tube in embryonic chick
neurulation in Xenopus sp.
See also
neurulation
nervous system development -
neural crest
3 November 2003WKP
Definition : Neural crest cells are a group of cells that migrate from the opposing epithelial folds of the closing neural tube in the back of the embryo to a number of positions inside the embryo.
These cells contribute to the development of several organs, the heart, facial skeleton, thymus, parathyroid, adrenal medulla and the whole peripheral nervous system. Neural crest cells are also needed for a normal development of the outflow region of the heart as well as for correct (...) -
embryonic kidney
10 March 2007See also
fetal kidneys
renal development
nephrogenesis
nephronogenesis -
Wolffian derivatives
9 March 2007Wolffian derivatives
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ductal plates
9 November 2004ductal plate
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notochord
27 June 2008WKP
Definition : In anatomy, the notochord is a flexible rod made out of a material similar to cartilage. If a species has a notochord at any stage during its life cycle, it is, by definition, a chordate.
The notochord lies along the anteroposterior ("head to tail") axis, is usually closer to the dorsal than the ventral surface of the animal, and is composed of cells derived from the mesoderm.
The notochord has been observed to have many functions including developmental functions. (...) -
anlage
13 May 2005Plural anlagen