Chapter 4 Embryology

Group of structures that includes the branchial arches, branchial grooves and membranes, and pharyngeal pouches.

Developmental cysts formed when branchial grooves do no become obliterated.

Developmental disturbances of the upper lip owing to failure of fusion of the maxillary processes w/ medial nasal process.

Anterior portion of the future digestive tract or primitive pharynx that forms oropharynx.

Prominence in the upper facial area at the most cephalic end of the embryo

During prenatal development, the joining of embryonic tissue of 2 seperate surfaces, the elimination of a groove between 2 adjacent swellings, or dental developmental disturbances in which 2 adjacent tooth germs unite to form a large tooth.

2nd branchial arch that lies inferiorly to the mandibular arch in the embryo.

Fused internal and inferior growth from the paired medial nasal processes on the inside of the stomodeum of the embryo.

Tissue on the outer portion of the nasal pits that forms the nasal alae.

Lower dental arch with mandibular teeth or the 1st branchial arch inferior to the stomodeum in the embryo.

Processes of the 1st branchial arch that fuse at the midline to form the mandibular arch.

Midline area of the mandible where the bone formed by fusion of right and left mandibular processes.

Prominence from the mandibular arch that grows superiorly and anteriorly on each side of the stomodeum of the embryo.

Cartilage that forms w/in each side of the mandibular arch and disappears as the bony mandible is formed.

Middle portion of the tissue growing around the nasal placodes located between the nasal pit on embryo.