Frontal bone. Inner surface. Medial wall of left orbit. Lateral wall of nasalcavity. Sagittal section of nose mouth, pharynx, and larynx. 副鼻腔 Paranasal sinuses
paired nasolacrimal ducts carry lacrimal secretions from the eye to the nasalcavity, and originate as oval openings near the edge of the medial canthus of
Society of America. pp. 206–208 ^ Weishampel, David B. (1981). “The nasalcavity of lambeosaurine hadrosaurids (Reptilia:Ornithischia): comparative anatomy