Vertebrate limb, Biology

Assignment Help:

Vertebrate Limb

Earlier we know that how a series of sequential and coordinated interactions between different cell groups and tissues carry about the construction of a complex organ, the vertebrate eye. In this we will study the development of other complex organ, the vertebrate limb. The paired limbs of all tetrapod vertebrates are made on a common basic pattern, develop in similar manner from cells derived from identical sources in the embryo and, hence, they are all homologous structures. An extremely large number of descriptive and experimental studies have been done on development in vertebrates throughout the present century.

At first the work was done mostly on amphibian embryos but later the chick has been chosen for, among other reasons, the chick embryos are large, easily accessible and obtainable throughout the year. As recently much experimental work has been done on the development of wing of chick embryos. The wing bud is comparatively a large structure and can be manipulated in several ways by the investigator. Portions of the bud can be cut out and their development studied through grafting them in the same or different embryos or on chorioallantoic membrane of older chick embryos. Its mesodermal and ectodermal components can be separated from each other by treatment along with some chemicals like trypsin, EDTA etc or microsurgery and then they can be reassembled readily in different combinations. The two components of such type of synthesized buds can be from the same or different limb types, from embryos of similar or different stages, of the same or different species. The development of such types of combinations can be studied by grafting them on embryos or chorioallantoic membrane or culturing them in vitro. Much of our understanding about the mechanisms involved in limb development has come from investigations on such studies on chick embryos.


Related Discussions:- Vertebrate limb

Express krebs cycle photosystem ii, Calvin cycle electron transport chain g...

Calvin cycle electron transport chain glycolysis Kreb's cycle photosystem II.

Genetic material, What is the central principle of molecular biology?

What is the central principle of molecular biology?

Enrobed meat products, E n r o b e d Meat Products Enrobing/coati...

E n r o b e d Meat Products Enrobing/coating of meat products with edible materials enhances the acceptability and creation of variety to meat products. Whole egg liquid,

Biodynamic dealing with energetic of organisms, Biodynamic: This dealing w...

Biodynamic: This dealing with energetic of organisms. Biodynamic is a method of organic farming which treats farms as unified or individual organisms, emphasizing balancing the ho

Which statement is false, Which is FALSE? Diastereomers: Select one: ...

Which is FALSE? Diastereomers: Select one: a. Have the same molecular weight b. Have the same connectivity c. Are mirror images d. All of the above e. None of the

What is the determination of vitamin B2, What is the Determination of vitam...

What is the Determination of vitamin B 2 In the chemical method, the yellow-green fluorescence of aqueous solution of riboflavin is measured. In the microbiological assay, tur

What are the attribute of amylase inhibitors, What are the attribute of amy...

What are the attribute of amylase inhibitors? This has been attributed to a number of reasons, Let us see how these inhibitors act. The inhibitor forms a complex with amylase,

Formation of egg membrane, FORMATION OF EGG MEMBRANE Ovum with egg memb...

FORMATION OF EGG MEMBRANE Ovum with egg membrane is called ova / egg.  On the basis of origin the egg membrane are of three types & 1 .      PRIMARY EGG MEMBRANE It is

Determine the atp-sensitive potassium channel, ATP-sensitive potassium chan...

ATP-sensitive potassium channel A. The channel is a spanning protein with a receptor site for ATP located on an intracellular region of the protein. B. When blood plasma lev

Experiment of an egg osmometer, An egg osmometer Place some dilute hydr...

An egg osmometer Place some dilute hydrochloric acid or strong vinegar in a shallow dish, likeas a saucer, to a depth of about one centimetre. Hold the large end an egg in the

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