The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . es the tears, which are ordinarily conveyed away bysmall ducts which run a short distance between the conjunctiva, andthen open on its surface a little above the upper border of the tarsalcartilages. The lachrymal canals commence at the puncta lachrymaliaand run inward to the lachrymal sac. The superior duct first ascends,then turning suddenly inward, forms an abrupt angle; the inferior duct,by descending, and then turning abruptly in
The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . es the tears, which are ordinarily conveyed away bysmall ducts which run a short distance between the conjunctiva, andthen open on its surface a little above the upper border of the tarsalcartilages. The lachrymal canals commence at the puncta lachrymaliaand run inward to the lachrymal sac. The superior duct first ascends,then turning suddenly inward, forms an abrupt angle; the inferior duct,by descending, and then turning abruptly inward, forms a similar lachrymal sac is the upper extremity of the nasal duct. It con-sists of a mucous membrane covered by a fibrous expansion of the ten-dons of the orbicularis and tensor tarsi muscles. The nasal duct is ashort canal, three fourtlis of an inch long, running downward, back-ward, and outward to the inferior meatus of the nose, terminating therain an enlarged orifice. OF THE ORGAN OF HEARING. The auditory apparatus is divided anatomically into the external ear,tympanum, or middle ear, and labyrinth >r internal eai. 196 STRUCTURE OF THE EAR. Fig. 102 ie a representation of all parts of the eix\ 1. Meatus auditoriue extcrnua. 2,Drum of the ear, or tympanum. 3, 4, 5. The bones of the ear. 7. Vestibule, the centralpart of the labyrinth. 8, 9, 10. The semicircular canals. 11, 12. The channels of thscochlea. 13. Auditory nerve. 14. Eustachian tube, the channel from the middle ear tothe throat. The External Ear.—The external ear consists of the pinna,»tunnel-shaped cartilaginous plate, which collects the vibrations of air,and the meatus, the tube which conveys them to the tympanum. The pinna piesents several folds and hollows upon its surface; aprominent rim, called helix, a curved ridge within it, called antihelix;this divides above, and encloses a space called scajihoid fossa; thepointed process over the opening of the ear is called tragus; a
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Keywords: ., bo, bookcentury1800, booksubjecthydrotherapy, booksubjectmedicine
