Describe the Changes That Occur When a Child Advances from the Concrete

question 27

Essay

Describe the changes that occur when a child advances from the concrete operational stage to the formal operational stage.

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Definitions:

Gastrulation

A phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula.

Germ Layers

The three primary layers of cells (ectoderm, mesoderm, and endoderm) in the early embryo that give rise to all organs and tissues in the body.

Embryonic Disk

Point in the inner cell mass at which the embryo begins to be formed.

Ectoderm

Outermost of the three germ layers of an embryo.