Limb field, Biology

Assignment Help:

Limb Field

By several marking and transplantation methods it is feasible to identify in early embryos the specific areas of groups of cells that ultimately make different organs. Identification of such types of areas helps to construct fate maps of dissimilar parts of embryos at different developmental stages. By using identical methods it has been possible to identify the presumptive areas of forelimbs and hindlimbs and localize exactly in the early embryos of several vertebrates. The prospective forelimb area in the tail bud stage embryo of the salamander, Ambystoma maculatum (Amphibia) is displayed in Figure. It is a circular disc-like area just behind the gill area containing ectoderm underlain by lateral plate mesoderm. The limb is actually made from cells in the central part of this disc and those surrounding this central part provide rise to peribranchial tissue and the shoulder girdle.

137_Limb Field.png

Figure: Prospective forelimb bud of Ambystoma a salamander. The central area contain those cells which are destined to form the free limb; the cells surrounding free limb are those which give rise to the peribranchial flank tissue and the shoulder girdle. The cells outside these regions usually are not included in limbs but can regulate to form a limb if more central tissues are removed.


Related Discussions:- Limb field

Viruses.., are there non-parasitic viruses

are there non-parasitic viruses

Determine about the disease - brain tumor, Determine about the disease - br...

Determine about the disease - brain tumor Tumor, or neoplasm, is a mass of new tissue that persists and grows independently of its surrounding structures and has no physiologic

What do you meant by diabetic ketoacidosis, Q. What do you meant by Diabeti...

Q. What do you meant by Diabetic Ketoacidosis? Diabetic Ketoacidosis (DKA) is one of the acute complications of diabetes mellitus. The name itself implies that there is acidosi

What is cilia and flagella, What is Cilia and Flagella? The surfaces of...

What is Cilia and Flagella? The surfaces of many eukaryotic cells bear cilia or flagella, built from specialized microtubules. Cilia are tiny brushlike hairs, and flagella are

Difference between cerebrum and brain, Q. What is the difference between ce...

Q. What is the difference between cerebrum and brain? What are the major parts of these structures? The concept of brain or encephalon comprehends the cerebrum mostly referred

Explain microbial sources of natural colourants, Novel Sources of Natural C...

Novel Sources of Natural Colourants Microbial sources Production of materials by microbial cultures has several advantages. The rapid growth of microbes cuts the productio

Listeriosis, Listeriosis The organisms have an extensive host range which ...

Listeriosis The organisms have an extensive host range which includes mammal, poultry, fish, crustaceans and ticks including man. The organism has been isolated from sheep, goats,

Sea, sea divisions

sea divisions

The wall of left ventricle of an infants heart, Because of developmental ab...

Because of developmental abnormality, the wall of left ventricle of an infant's heart is as thin as that of right ventricle. What would be its explicit effect on circulation of blo

Phylum sarcomastigophora - protozoan, Phylum Sarcomastigophora Locomo...

Phylum Sarcomastigophora Locomotory organelles - flagella, pseudopodia or both types, usually with one type of nucleus; typically no spore formation, sexual reproduction thro

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