Formation of notochord and somites, Biology

Formation of Notochord and Somites

The formation of notochord and somites from the transplanted dorsal lip was supposed; these are normally derived from cells of the dorsal lip. Even the formation of gut could be explained because the process of involution of the transplanted dorsal lip would produce a secondary archenteron. But the most surprising feature was the formation of neural tube that is not a derivative of dorsal mesoderm (a tissue that differentiates from cells of the dorsal lip) but is formed from ectodermal cells. Microscopic examination had displayedthat the neural tube had developed from the non-pigmented cells of the host ectoderm that were otherwise destined to develop into belly skin. Based upon these results. Spemann concluded that the dorsal lip material had induced the overlying prospective epidermal ectoderm to become neural tissue. During gastrulation involution of chordarnesodermal (dorsal lip) brings this mesoderm into contact with the overlying ectoderm . This contact induces the ectoderm thatnow becomes determined to develop into neural tissue. The other regions of the ectoderm that do not come into contact with the chord mesoderm develop into epidermis and its derivatives.

Posted Date: 1/28/2013 8:18:29 AM | Location : United States







Related Discussions:- Formation of notochord and somites, Assignment Help, Ask Question on Formation of notochord and somites, Get Answer, Expert's Help, Formation of notochord and somites Discussions

Write discussion on Formation of notochord and somites
Your posts are moderated
Related Questions
Quantification of Tricuspid Regurgitation Echocardiography and right ventricular angiogram can quantify tricuspid regurgitation. Echo Quantification Trivial: Non susta

Q. What is the relation between the maximum and the minimum blood pressure with the phenomena of systole and diastole? A minimum blood pressure is the pressure on the wall of t

What are two specific organs that work together to preform a function??

Fungi are classified in their own kingdom. Into which phyla is the fungi kingdom divided? Into which of those phyla are mushrooms classified? The kingdom fungi is separated in

Gene targeting in somatic cells: Since the pioneering work with sheep at Roslin cloning by nuclear transfer has now been exemplified in a number of other livestock species includ

what are the disadvantages of protozoa?

which is the last enzyme in the thrombotic system?

Venipuncture : patient should be seated or supine for at least 20 minutes before sampling. An arm with an inserted intravenous line should be avoided. The median cubi

Biological catalysts à speed up chemical reactions in the body without being consumed in the process Reduce the activation energy needed for reactants to reach the transit

Question 1 A patient is admitted to the hospital with suspected pneumococcal pneumonia. How would you confirm this initial diagnosis? Answer the following questions a) Which is