It is also possible that some of the topically applied drug may get into systemic circulation via the nasal lacrimal duct and then reach the retina systemically.
In the corner of the lacrimal a shallow depression is present, which is pierced by a smaller foramen.
Tetrapods are also equipped with a lacrimal duct, or tear duct.
Understimulation of other exocrine glands leads to xerostomia (dry mouth), thirst, and decreased secretions from lacrimal, nasal, bronchial, and gastrointestinal glands.
However, it is known that the lacrimal glands and the conjunctiva contribute to ocular defenses via secretion of both immunoglobulins and lymphoid tissues.
The ethmoidal air cells consist of numerous thin-walled cavities situated in the ethmoidal labyrinth and completed by the frontal, maxilla, lacrimal, sphenoidal, and palatine bones.
He did a detailed study of rosacea keratitis, and performed extensive research on the physiology and microanatomy of the eye's lacrimal apparatus.
In many dinosaurs, the lacrimal bone comes into contact with the nasal bone, the jugal bone, the prefrontal bone, and the maxillary and premaxillary bones.
