Organogenesis Flashcards
summarise organogenesis
Formation of organs and organ systems, involves the localised shape changes of tissues and individual cells
What is neuralation?
Refers to the folding process in vertebrate embryos, which includes the transformation of the neural plate into the neural tube
What forms first in frogs and other chordates?
The neural tube and notochord
How does the neural plate form?
Forms in response to a number of signalling molecules secreted by mesoderm tissues
How does the notochord form?
Forms from dorsal mesoderm that condenses when cells associate tightly as a group just above the archenteron
How does the neural tube form and what does it become?
Neural plate curls inwards, rolling into a tube. It becomes the animals CNS
What is the neural crest?
Develops in vertebrate embryos, develops along border where neural tube pinch off from ectoderm
What do neural crest cells do?
Migrate to various parts of the embryo and form peripheral nerves, teeth, skull bones etc.
What happens to strips of mesoderm lateral to the notochord form?
Separate into blocks called somites.
What are somites?
Division of the body of an animal or embryo
