Compare the structures and cell movements of sea urchin gastrulation to those of frog gastrulation. The...

Compare the structures and cell movements of sea urchin gastrulation to those of frog gastrulation. The goal is to find similarities and differences between these two phyla of deuterostomes, echinoderms (sea urchins) and chordates (frogs).

Expert Solution

Answer :-

Gastrulation defined as a early phase in the developmental process of embryo, in which a simple layer blastula structure develop into a multi layered gastula structure.

#Comparison of Frog and Sea urchin Gastrulation phase of embryo development:-

*Most of the Gastrulation process is similar in both cases as both are deuterostomes and their blastophore first opening develops into anus.

*Gastrulation in sea urchin takes approximately 9 hour time to complete, in the hollow blastula the mesenchyma cells integrate to develop more multi layered gastrula which later differentiate into primary skeletal structures inside the embryo.

*But Gastrulation in case of frog is a more sophisticated then in the sea urchin.

The blastula of frog is not hollow as you see in case of Sea urchin but it is filled with the yolk cells. And the ectoderm and endoderm in frog is developed from blastula but its mesoderm is develop from the yolk cells.

gladiator answered 2 years ago

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