Common features of eye and limb development, Biology

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.

Posted Date: 1/30/2013 5:41:13 AM | Location : United States







Related Discussions:- Common features of eye and limb development, Assignment Help, Ask Question on Common features of eye and limb development, Get Answer, Expert's Help, Common features of eye and limb development Discussions

Write discussion on Common features of eye and limb development
Your posts are moderated
Related Questions
Explain Oxygen Therapyin respiratory support? Oxygen is given to correct hypoxemia. An initial high concentration of oxygen (FiO2) is given while the underlying cause is identi

Endocrine versus Neural Integration A question that surely comes across your mind is, "what is the need for two types of integrative mechanisms, the neural and the endocrine"

Explain the Biography of Pedanius Dioscorides? Pedanius Dioscorides, a Cicilian Greek, who lived in the first century A.D. was the most important botanist after Theophrastus. H

Q. Can two normal individuals of the same species with sexual reproduction have identical karyotypes and identical genomes? And how is the human karyotype usually represented?

Define Drug effects on Metabolism of dietary components? Drugs can also compete with, or inhibit, the metabolic conversion of some micronutrients to their active metabolites,

Pleural Biopsy Pleural biopsy is one of the diagnostic procedure which may  cause lot of anxiety in  the patient. Procedure Pleural biopsies may be preformed surg

L YMPH A TI C SYSTEM As 'Middle man' of circulation it mediates exchange between blood and the tissue. It is also a collecting system like venous system. Basically 'o

Describe Meristems term in diversity of life? Plant development goes through a stage known as primary growth, which produces what is referred to as the "primary plant body." A

Determine the Benedict's Test Glucose in urine is detected by Benedict's method and the test is known as Benedict's test. This test is used to detect glucose in urine (Glycosur

They result from septic embolization of vegetations to the arterial vasa vasorum or the intraluminal space, with subsequent spread of infection through the intima and outward throu