Embryology Somitogenesis

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Last updated: July 18, 2018

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Hint	Answer
By what day in developement wis the notochord fully formed?	18
About what day does somitogenesis begin?	21
Which somites are formed first?	Cranial
Somites differentiate into 3 key parts Sclerotome, dermatome, and what is the third?	Myotome
Which one produces the axial skeleton?	Sclerotome
How much of each individual somite goes to help form a vertebrae?	Half
What gene/transcription factor gives each somite an address/specification?	Hox
What tissue are somites formed from?	Paraxial mesoderm

Hint	Answer
What is the name given to the progenitor of the heart?	Cardiogenic region
The name the embryonic precursor to the diaphragm.	Septum transversum
The name given to the cap of the gut tube at the cranial end.	Buccopharyngeal membrane
and the same at the caudal end?	Cloacal membrane
The name given to the yolk sac when it becomes restricted to a narrow stalk.	Vitelline duct
Also known as shingles, it is a viral infection which accompanies a specific dorsal root nerve, giving a very recognisable pattern of blistering.	Herpes Zoster
The name of the condition when you have an extra rib coming from C7.	Cervical rib

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