Common features of eye and limb development, Biology

Assignment Help:

Common Features of Eye and Limb Development

A comparison of the embryonic development of the very much different organs, the eyes and the limb, points to various interesting common features of organogenesis.

1) Both the eye and the limb originate in a morphogenetic field, which may be described as a sum total of properties and commitment of a specific area of embryo in time to form an organ. The concept of a morphogenetic field describes many experimental observations.

2) In both organs the participating cells comprise diverse origins: surface ectoderm, neural ectoderm, mesenchyme derived from neural crest cells and head mesoderm in the case of eyes; and surface ectoderm, somitic and lateral plate mesoderm in the limbs. In addition cell types such as those in the circulating blood and of nervous tissue invade both the organs.

3) Tissue interaction plays a main, in fact decisive role in the proper development of both the organs. The interactions of two types: one way inductions and two way reciprocal interactions.

The instance of one way induction includes corneal induction by the lens in the eye and the instances of two way tissue interaction include mesoderm-AER interaction in the limbs and optic vesicle-lens ectoderm interaction in the limbs. These make sure the harmonious development of all parts in both the organs.

4) In the organogenesis of both of the inductive messages from one tissue to another are often operative across the non-specific and species.

5) In the development of both the eyes and limbs massive cell death takes place which is genetically programmed and plays a role in pattern creation.


Related Discussions:- Common features of eye and limb development

Determine about the sense of contrast, Determine about the Sense of  Contr...

Determine about the Sense of  Contrast It is  the ability to  perceive  slight changes  in  luminance between  regions which  are not  separated by  definite borders. This  is

Describes calcium metals, Which of the following terms best describes calci...

Which of the following terms best describes calcium metals? Check all that apply. Molecule, element, matter, and compound

Explain significant proportion of starch in the normal diet, Significant pr...

Significant proportion of starch in the normal diet A significant proportion of starch in the normal diet escapes degradation in the stomach and small intestine and is labeled

Why to dilute this stock to give the desired concentration, You are working...

You are working on a protocol in lab that requires 10ml of a 5% saline solution for a particular step. All you have in your lab is a 20% saline stock solution. How can you dilute t

The population thus contains secretors, The A and B antigens in humans may ...

The A and B antigens in humans may be found in water-soluble form in secretions, including saliva, of some individuals (Se/Se and Se/se) but not in others (se/se). The population t

How muscle contraction intensely increased, To increase the strength of the...

To increase the strength of the muscle work is the muscle contraction intensely increased? An increase in the strength of the muscle work is not achieved by enhance in the inte

What do you mean by cold deserts, What do you mean by Cold Deserts? Col...

What do you mean by Cold Deserts? Cold deserts cover a vast area north of the Himalayan ranges forming an ecosystem with exceptionally low temperatures which may reach - 75°C a

Homeostasis, HOMEOS T ASI S - Homeo = same,   Stasis = state Li...

HOMEOS T ASI S - Homeo = same,   Stasis = state Living beings maintain their internal environment by self regulating system, it is called homeostasis. Term coined by

Explain potassium, Explain Potassium Potassium (K): Potassium restri...

Explain Potassium Potassium (K): Potassium restricted diets are important for patients with  advanced renal  failure undergoing  conservative  treatment or haemodialysis. Th

How delayed complementary feeding cause pem, How Delayed Complementary Feed...

How Delayed Complementary Feeding Cause PEM? The mothers from poorer socioeconomic groups where PEM is more prevalent, delayed introduction of complementary foods (foods in add

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd