First stage of invagination, Biology

First Stage of Invagination

The large endodermal cells that are remaining in the vegetal plate move laterally towards the centre of the plate and fill the gap in the vegetal plate caused through the ingression of the primary mesenchyme cell. As a result, the vegetal plate turns into even more flattened. Soon thereafter the plate bends inwards (invagination) in the centre initiating the creation of a new cavity called the archenteron (primitive gut). Its opening at the vegetal pole is the blastopore. Invagination proceeds till the archenteron extends into the blastocoel about one third the distances among the vegetal and animal poles and then stops. The endodermal cells invaginate even if the vegetal plate is isolated and cultured in vitro pointing out that invagination occurs due to intrinsic properties of these cells and no external force is involved. Invagination possibly occurs as a result of constrictive activity of microfilaments at the outer ends of the cells of the vegetal plate.

Posted Date: 1/25/2013 5:03:35 AM | Location : United States







Related Discussions:- First stage of invagination, Assignment Help, Ask Question on First stage of invagination, Get Answer, Expert's Help, First stage of invagination Discussions

Write discussion on First stage of invagination
Your posts are moderated
Related Questions
Q What are some examples of tissues and organs where mitosis is more frequent, less frequent or practically absent? Generally in vertebrates mitosis is more frequent in tissues

Cost of Accidents Immediate Cost Immediate cost takes into account the loss of work, damages to equipment and facilities which have to repaired and restored or replaced

The following progeny genotypes were observed: 73 AaBb, 64 aabb, 279 Aabb, 303 aaBb. Using a chi-square test, test whether these two loci show independent assortment? How would

Q. What is the respective importance of water, carbon and nitrogen for living beings? Water is the major solvent of living beings and it is necessary practically for all bioche

What is Muscle tissue explain briefly? Remember that a skin cell, in addition to the genetic information that allows it to form into a skin cell, also has all of the genetic in

Picaridin Laboratory and field studies documenting the efficacy of picaridin. No published data are available on the efficacy of the 7% solution now available in the US. Insec

Q. Concerning the occurrence of separated sexes how are the beings of the phylum Annelida classified? These beings may be dioecious (the majority of polychaetes) or hermaphrodi

What is hemoglobin? What is the inorganic element that is fundamental in the composition of hemoglobin? Hemoglobin is the protein present in the blood responsible for the trans

what are viruses

How do CAM plants vary from both C 3 and C 4 plants? CAM plants open their stomata at night, while C 3 and C 4 plants open their stomata during the day.