676 



TEXT-BOOK OF PHYSIOLOGY. 



The secretion (the tears) is conducted from the gland to the outer part of the 

 conjunctiva by seven or eight ducts. The lachrymal secretion consists of 

 water and inorganic salts. It is distributed over the corneal surface during 

 the act of winking, thus keeping it moist and free from foreign particles. 



FIG. 335. THE LACRIMAL AND MEIBOMIAN GLANDS, AND ADJACENT ORGANS OF THE EYE. 

 i, i. Inner wall of orbit. 2, 2. Inner portion of orbicularis palpebrarum. 3, 3. Attachment to 

 circumference of base of orbit. 4. Orifice for transmission of nasal artery. 5. Muscle of Horner 

 (tensor tarsi). 6, 6. Meibomian glands. 7, 7. Orbital portion of lacrimal gland. 8, 9, 10. 

 Palpebral portion, n, n. Mouths of excretory ducts. 12, 13. Lacrimal puncta. (Sappey). 



It eventually passes into the lachrymal ducts and then into the nose. The 

 lachrymal glands receive secretory fibers by way of the fifth nerve and the 

 cervical sympathetic. The secretion can be excited reflexly from stimulation 

 of sensor nerves as well as by emotional states. 



