Second stage of invagination, Biology

Assignment Help:

Second Stage of Invagination

The 2nd stage of invagination starts with release of secondary mesenchyme from the tip of archenteron into the blastocoel. The cells of secondary mesenchyme stay in which they are released at the tip of archenteron but their filopodia extend up to and attach to the inner side of the wall of blastocoel opposite to blastopore. Contractions of these ' filopodia pull the archenteron in the direction of the animal pole causing further invagination of the endoderm. Finally, the archenteron bends and its tip fuse along with the blastocoel wall on the ventral side where the mouth opens later. The secondary mesenchyme then disperses in the blastocoel and gives increment to mesodermal organs.


Related Discussions:- Second stage of invagination

Explain the cladosporium - fungi and yeast, Explain the Cladosporium - Fung...

Explain the Cladosporium - Fungi and Yeast? Classification Kingdom - Mycetae Division - Amastigomycota Form - Class - Deauteromycetes Form - Order - Moniliales F

Describe about the mitochondrial membranes, Describe about the mitochondria...

Describe about the mitochondrial membranes The composition of the two mitochondrial membranes is entirely different. The outer membrane is rich in lipids and contains nearly 50

What are the habits of patients- implants, Habits of patients- Implants ...

Habits of patients- Implants Smoking has been shown to predispose to poor bone quality by reduced vascularity. Therefore it is prudent not to accept heavy smokers as implant pa

Can you explain deoxynivalenol mycotoxicosis, Q. Can you explain Deoxynival...

Q. Can you explain Deoxynivalenol Mycotoxicosis? During 1987, an outbreak estimated to have affected over 50,000 people in the State of Jammu and Kashmir, was traced to the c

Process of determination of vitamin B12, Determination of vitamin B 12 ...

Determination of vitamin B 12 Spectrophotometric determination of the characteristic ultraviolet absorption is suitable for the determination of pure vitamin B 12 or of pure

Auxins, Auxins The history of discovery of auxin is a fascinating chap...

Auxins The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darw

Explain indications for surgery of congenital pulmonary, Explain Indication...

Explain Indications for Surgery of Congenital Pulmonary Stenosis ? Interventional treatment is required for all neonates presenting with critical pulmonary valvar stenosis. Thi

Define feeding and nutritional management of spinal trauma, Define the Feed...

Define the Feeding and Nutritional Management of spinal trauma? The main objectives of nutritional management are to meet the nutritional needs of the initial acute phase and

What are classes into which the phylum arthropoda is divide, Q. What are th...

Q. What are the classes into which the phylum Arthropoda is divided? What are the three major ones and some of their representative species? The three main classes of arthropod

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