In the development of vertebrate animals,<unk>  or branchial pouches form on the endodermal side between the branchial arches, and<unk>  grooves (or clefts) form the lateral ectodermal surface of the neck region to separate the arches. The pouches line up with the clefts, and these thin segments become gills in fish.
Pharyngeal pouch 
Pharyngeal recess
Hard palate
First pharyngeal arch
Branchial pouch
Mucogingival junction
Larynx
Pharynx