Optic vesicle, Biology

Optic vesicle

We have explained earlier that the presumptive material for the optic vesicles lies in qe eye field in the anterior region of the early neural plate. Experiments on amphibian embryos have displayed that if at this early open neural plate stage this material is cut out and grafted in the flank of another embryo it forms an eye cup displaying that the cells of eye field are already determined to form the eye. This determination is preceded by induction of the ectoderm to form the neural plate by the invagination chordamesoderm throughout gastrulation.

This is followed by the inductive action of the anterior part of chordamesoderm which comes to be underneath the prospective forebrain region of the neural plate, on the anterior part of neural plate. If this mesoderm is eliminated at this stage the eye field does not split and one median eye is formed. Furthermore, if this anterior chordamesoderm is grafted within the prospective hind brain region of the neural plate it induces an eye field in that region. Continued relation with mesoderm is as well essential for further development of the optic vesicle.

Posted Date: 1/28/2013 8:23:26 AM | Location : United States







Related Discussions:- Optic vesicle, Assignment Help, Ask Question on Optic vesicle, Get Answer, Expert's Help, Optic vesicle Discussions

Write discussion on Optic vesicle
Your posts are moderated
Related Questions
Define Mechanism of Rotary Instrument Fracture - Cyclic Fatigue Occurs unexpectedly and without any visible signs of plastic deformation o An instrument rotating freely in a cu

The second maturation division of the mammalian ovum occurs: 1. Shortly after ovulation before the ovum makes entry into the Fallopian tube 2. Until after the ovum has been p

Equine encephalomyelitis Encephalomyelitis or inflammation of the brain tissue and the spinal cord, can be brought about by different viruses. Eastern-, Western- and Venezuelan

Q. Why in bread and cake manufacture are alcoholic fermenting organisms used and not lactic fermenting organisms? Fermentation has the function of making breads and cakes grow

Photoperiodism Activity like breeding and migration in animals; flowering, seed germination in plants are regulated by the length of daily period of light and darkness. This be

What is the difference between ectoparasite and endoparasite? Ectoparasites are parasites that explore the external surface of the host (as, for example, mites that parasite th

What is the difference between analogous and homologous organs? The Characteristics of different species are said to be analogous when having the same biological function, for


Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Which are the beings that form the kingdom Animalia? What are the two big groups into which this kingdom is divided? The kingdom Animalia is the animal kingdom. Commonly the ki