51.5 General Events of Embryonic Development

tubelike structure

What is created by two hinge points? Answer with a single words or term.

neural tube

What is closed by the cells on each side? Answer with a single words or term.

Researchers

________ are beginning to understand some of the fun involution, surface cells spread from the animal hemisphere to damental steps in the formation of the central nervous system.

neural crest

What is formed by Adjacent regions? Answer with a single words or term.

blastocyst

A(n) ________ is composed of an outer layer called the trophectoderm, which gives rise to extraembryonic tissues such as the placenta and an inner cell mass, which develops into the embryo.

germ layer

Each ________ gives rise to different types of cells.

neural plate

What is formed by the ectoderm over the notochord? Answer with a single words or term.

Body seg ments

What are sections of the axes that contain specific body parts such as a wing or leg? Answer with a single words or term.

germ lay blastocyst

The ________ has a different appearance than the ers, partially differentiated tissues, and no animal embryo.

Germ lay ers

What are primary layers of cells that form during gastrulation and are a key event? Answer with a single words or term.