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
Determine about the diseases Sleep attacks These are brief, often irresistible, episodes of sleep, probably slow wave, NREM, naplike sleep that last about 15 minutes and can oc

Xerarch - Kinds of Succession When the succession takes place in drier area, i.e., the succession progresses from xeric to mesic conditions. It is further subdivided as:

How much salt is in the human body? 50 Kilo human has about 7 tablespoons of salt inside there body.

Elaborate the internal vascular circulation of an eye. Retinal vessels are derived from central retinal artery and are distributed within the inner two-third of retina. Outer o

Topical Route The medication in topical route is administered through ear, nose and eye. Drops are instilled into the nose, ear and eyes of the child in much the same way

Explain about the freeze drying Method? The Techniques of freeze-drying have been developed over the past half-century for the purpose of preserving certain biological material

Schizocoelous pattern – Coelom There are two patterns of coelom formation in animals schizocoelous and enterocoelous. In schizocoelous pattern, two teloblasts cells (primordi

How implants increases the magnitude significantly The patient should be medically fit to undergo the surgery. Placement of one or two implants is equivalent to relatively mino

Photosynthesis - Responses of Plants to Stress Photosynthesis is also inhibited due to low water potential in the leaves. The leaf water potential is the sum of turgor pressur

Pre-operative and Post-operative Nursing Care of a Child with Cleft Lip: We shall begin with pre-operative nursing care and then focus on post-operative care. As you know that