The _____ are rounded areas of specialized,thickened ectoderm found at the location of developing special sense organs.

Question

Quizplus · Accepted Answer

The placodes are rounded areas of specialized,thickened ectoderm found at the location of developing special sense organs.During the fourth week of prenatal development,stacked bilateral swellings of tissue called the branchial arches appear inferior to the stomodeum and include the mandibular arch.Four well-defined pairs of pharyngeal pouches develop as endodermal evaginations from the lateral walls lining the pharynx.Facial development depends on five major facial processes that form during the fourth week and surround the primitive mouth of the embryo: single frontonasal process and paired maxillary and mandibular.

The _____ Are Rounded Areas of Specialized,thickened Ectoderm Found at the Location