Divergence - mechanism of gastrulation, Biology

DIVERGENCE -

In it blastomeres move in different directions i.e. inside the blastocoel the blastomeres move in different directions.
The blastomeres which move inside i.e. the involuted blastomere are called chordamesoderm.
Chorda-mesoderm forms complete Notochord. Mesoderm is a part of endoderm.
Remaining endoderm forms from megameres.
At the end of gatrulation, blastopore contracts and the megameres close this pore.
These megameres look like a plug and so this is termed as Yolk plug stage. It is formed at the end of gastrulation.

Related Discussions:- Divergence - mechanism of gastrulation

Conduction of impulse, CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXO...

CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXONS - The impulse moves along the axon as local effect by altering the permeability of neighbouring Na + channels and af

Food gathering and hunting , Food Gathering and Hunting : Food Gatherin...

Food Gathering and Hunting : Food Gathering and Hunting In order to live, man needed to eat and to protect himself from the weather and animals. For both purposes he found it

Haemoglobin, Haemoglobin Among the respiratory pigments we shall consi...

Haemoglobin Among the respiratory pigments we shall consider haemoglobin in some detail as this is the most familiar, widespread as well as the most efficient respiratory pigm

Growth and development, details and terms used in growth and development?

details and terms used in growth and development?

Congestive heart failure (chf), C o ngestive heart failure (CHF) The ...

C o ngestive heart failure (CHF) The heart is unable to maintain circulatory equilibrium at rest and congestion of venous circuit takes place followed by dilatation of vessel

What are the different phenotype, What is the genetic condition in which th...

What is the genetic condition in which the heterozygous individual has different phenotype from the homozygous individual? This condition is called lack of dominance and it can

Maedi/visna, Maedi/visna Maedi, a progressive pneumonia, and visna, a n...

Maedi/visna Maedi, a progressive pneumonia, and visna, a neurotropic disease, found in sheep and goats are caused by the Maedi/visna virus, belonging to the family Retroviridae

Determine the blood plasma levels of oxytocin, Which of the following serve...

Which of the following serves as an actuating signal, or as part of an actuating signal, in a system with feedback? (Either positive feedback or negative feedback) A. Blood pla

Photosynthesis, explain the role of photophosphorylation and chemiosmosis i...

explain the role of photophosphorylation and chemiosmosis in photosynthesis

Observation at the park, Ask question #What kinds of detritus or carrion ca...

Ask question #What kinds of detritus or carrion can you observe in this ecosystem? Is there any evidence that scavengers, detritivores or decomposers are utilising this decomposing

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages