At the end of gastrulation, the ectoderm makes up the
A) lining of the embryonic digestive tract.
B) outer layer of the gastrula.
C) inner layer of the gastrula.

Question

Quizplus · Accepted Answer

During gastrulation, the blastula is reorganized into a three-layered structure. The outermost layer is the ectoderm, which forms the outer layer of the gastrula. The innermost layer, the endoderm, forms the lining of the embryonic digestive tract. The middle layer, the mesoderm, gives rise to various structures including the muscles, bones, and circulatory system.

At the End of Gastrulation, the Ectoderm Makes Up the