part of part of develops from adjacent to external ectoderm unilaminar epithelium lateral nasal prominence embryonic tissue maxillary prominence nasolacrimal groove On the nasal surface of the body of the maxilla, in front of the opening of the sinus is a deep groove, the lacrimal groove (or lacrimal sulcus), which is converted into the nasolacrimal canal, by the lacrimal bone and inferior nasal concha; this canal opens into the inferior meatus of the nose and transmits the nasolacrimal duct[WP] See also: oblique facial cleft 1st arch maxillary ectoderm nose epithelium embryonic craniocervical region