NDAEB - Embryology fully solved

NDAEB - EmbryologyPrimary embryonic layers - correct answer ectoderm, mesoderm, endoderm Ectoderm - correct answer outermost germ layer; produces sense organs, nerves, and outer layer of skin Mesoderm - correct answer middle germ layer; develops into muscles, and much of the circulatory, reproductive, and excretory systems Endoderm - correct answer the inner germ layer that develops into the lining of the digestive and respiratory systems Stomodeum - correct answer The embryonic invagination that becomes the oral cavity First branchial arch (mandibular arch) - correct answer forms bones muscles and nerves of the face second branchial arch (hyoid arch) - correct answer Forms styloid process, stapes ear, stylohyoid liagment, and partbof the stylohyoid bone. Forms side + front of the neck, and some facial expression muscles ... smile third branchial arch - correct answer forms the body of the hyoid and posterior tongue fourth, fifth, and sixth branchial arches - correct answer forms the structures of the lower throat, including the thyroid cartilage, and the muscles and nerves of the pharynx and larynx. primary palate - correct answer Anterior part of final palate derived from intermaxillary segment during prenatal development secondary palate - correct answer posterior part of final palate formed by fusion of two palatal shelves