. Cunningham's Text-book of anatomy. Anatomy. 824 THE ORGANS OF SENSE. from the supra-orbital and frontal arteries. The veins are arranged in two sets: (a) subcon- junctival or retrotarsal, opening into the muscular tributaries of the ophthalmic veins, and (6) pretarsal, into the angular and superficial temporal veins. The lymph vessels, like the veins, form pre- and retrotarsal networks, which communicate with each other through the tarsal plates. The lymph is drained chiefly into the anterior auricular and parotid lymph glands, but partly, by vessels which accompany the anterior facial vein,
. Cunningham's Text-book of anatomy. Anatomy. 824 THE ORGANS OF SENSE. from the supra-orbital and frontal arteries. The veins are arranged in two sets: (a) subcon- junctival or retrotarsal, opening into the muscular tributaries of the ophthalmic veins, and (6) pretarsal, into the angular and superficial temporal veins. The lymph vessels, like the veins, form pre- and retrotarsal networks, which communicate with each other through the tarsal plates. The lymph is drained chiefly into the anterior auricular and parotid lymph glands, but partly, by vessels which accompany the anterior facial vein, into the submaxillary lymph glands. The sensory nerves of the eyelids are supplied by the trigeminal nerve—the upper lid chiefly by the supra-orbital and supra-trochlear branches of the ophthalmic; the lower, by the infra - orbital branch of the maxillary. The region of the lateral commissure receives some filaments from the lacrimal nerve, that of the medial from the infra-trochlear. These sensory nerves form a marginal plexus behind the orbicularis oculi muscle. The levator palpebrte superioris muscle is supplied by the oculomotor the non-striped fibres of the eyelids by the sympathetic. APPARATUS LACRIMALIS. The lacrimal apparatus consists of: (1) the lacrimal gland, which secretes the tears ; (2) the lacrimal ducts, by which the tears are drained from the front of the eye; and (3) the lacrimal sac and naso-lacrimal duct, which convey them into the nasal cavity. Lacrimal gland (superior part) Temporal muscle Temporal fascia Excretory ducts of lacrimal gland Lacrimal gland., (inferior part) Infra-orbital nerve Maxillary sinus Buccinator. Superior fornix of conjunctiva Puncta lacrimalia Lacrimal ducts Lacrimal sac Medial palpebral ligament Xaso-lacrimal duct Middle concha Muco- periosteum Plica lacrimalis Inferior meatus Inferior concha Fig. 700 TO SHOW THE LACRIMAL APPARATDS. Glandula Lacrimalis.—The lacrimal gland is a flattened, oval body situated in the supe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
