Question

Use words and diagrams to show how the ectoderm, mesoderm and endoderm layers are formed in Xenopus laevis.

Answer 1

These are the three layers of embryo which are involved in the formation of various parts of the body.

The term "derm" means skin or layers.

As the name gives the idea that "ecto" means upper or outer. So the ectoderm is the outer most layer of the three germ layers.

ecto - outer derm- layer

Mesoderm is the middle layer present between outer ectoderm and inner endodermal layer.

Meso - middle derm - layer.

Endoderm: inner most layer of the embryonic stage.

All of these layers have specific role in the organ and system formation in the organisms body.

These are the germ layers occurs in the embryonic stage and further they give rise to organs like heart, liver, gut etc.