Quain's elements of anatomy . the skin, and that of the organ of taste with thetongue. THE EYE. The organ of vision, strictly speaking, consists only of the ball orglobe of the eye ; but connected with the eyeball externally are muscles,nerves, and blood-vessels, elsewhere described, as well as other partsspecially destined for its protection, and known as the appendages of theeye (tutamina oculi), of which an account will first be given. THE EYELIDS AND CONJUNCTIVA. The eyelids {palpelrce) are moveable portions of integument, strength-ened towards their margins by a thin lamina of dense fibro
Quain's elements of anatomy . the skin, and that of the organ of taste with thetongue. THE EYE. The organ of vision, strictly speaking, consists only of the ball orglobe of the eye ; but connected with the eyeball externally are muscles,nerves, and blood-vessels, elsewhere described, as well as other partsspecially destined for its protection, and known as the appendages of theeye (tutamina oculi), of which an account will first be given. THE EYELIDS AND CONJUNCTIVA. The eyelids {palpelrce) are moveable portions of integument, strength-ened towards their margins by a thin lamina of dense fibrous tissue (Jar-sus). A mucous membrane {cojijwictiva) lines their inner surface, andis reflected thence on the front of the eyebaU. The line of reflection istermed the fornix of the conjunctiva. Fig. 322.—Front view of the eight EYE, WITH THE EYELIDS DRAWN APART BY BLUNT HOOKS (Merkel). Ps, plica semilunaris ; Pis, Pli, punc-tuin lachrymale sup. et inf. ; Car, carun-cula lachrymalis; I/pm, internal tarsalligament. Fig. The upper lid is larger andmore moveable than the lower,aU the transparent part of theglobe being covered by it whenthe eye is closed; it is chiefly bythe elevation of this lid that theeye is opened, the movement beingeflFected by a muscle [levator pal-liebrcB) devoted exclusively to thispurpose. At the outer and innerangles (canthi) of the eye the eyelids are united. The interval between the angles varies in differentindividuals, and, according to its extent, gives the appearance of aLn-ger or a smaller eye, the size of the globe being nearly the same inall. The greater part of the edge of each eyehd is flattened and angular,but towards the inner canthus it is rounded off for a short space, at thesame time that it changes its direction ; at this point there is seen oneach lid a slight elevation (papilla lachrymalis,)—the apex of which ispierced by the apertm^e (punctum) of a smafl canal {canaliculus lachrij-malis) which serves to convey away the fluid
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
