Anatomy Of The Lacrimal System
The main lacrimal gland is split into two lobes the palpebral and the orbital one by the lateral horn of the levator aponeurosis. They also provide structural support for the lacrimal system.
Lacrimal Apparatus Orbital Septum Superior Tarsus Medial Palpebral Ligament Lacrimal Sac Lacrimal Gland Eye Illustration Anatomy Eyes
The length of the vertical portion is 2 mm and that of the horizontal part is 10 mm 6.
Anatomy of the lacrimal system. Its transitional part occasionally dilates to form an irregular dilated cavity or ampulla Fig. The lacrimal apparatus is the physiological system containing the orbital structures for tear production and drainage1 It consists of. In this section the embryology osteology nasal and paranasal sinus anatomy.
The following components of the lacrimal drainage system anatomy. Burkat CN Lucarelli MJ. The lacrimal system contains the lacrimal gland which produces tears and the nasolacrimal duct which drains tears from the eye to the nose.
As tears are produced some fluid evaporates between blinks and some is drained through the lacrimal punctum. In this article we shall look at the anatomy of the lacrimal glands their location neurovascular supply and clinical relevance. Eds The Lacrimal System.
Lacrimal bones provide structure for the orbital cavity and support the eye. SIVATEJA CHALLA ANATOMY OF THE LACRIMAL APPARATUS 2. Lacrimal gland Glandula lacrimalis The lacrimal gland tear gland is an exocrine gland located above the eyeball in the anterior part of the upper outer aspect of each orbit.
In this section the embryology osteology nasal and paranasal sinus anatomy and secretory and excretory components of the lacrimal system are described in detail with clinical and surgical correlates. ANATOMY AND PHYSIOLOGY OF THE LACRIMAL SYSTEM The secretory components of the lacrimal system include the main and accessory lacrimal glands the gland of the nictitans third eyelid the meibomian glands and the conjunctival goblet cells. Embryology Osteology Secretory system Excretory system 4.
The lacrimal gland is composed of cells that produce proteins and electrolytes and cause water to follow by osmosis. 2006 Anatomy of the Lacrimal System. Lacrimal gland ventral view The blood supply of the gland is from the lacrimal artery a branch of the ophthalmic artery with the venous drainage through the superior ophthalmic vein.
The tears that are drained through the punctum will eventually be drained through the nose. A thorough understanding of lacrimal system anatomy is essential for the successful management of the tearing patient. The lacrimal system is made up of a secretory system which produces tears and an excretory system which drains the tears.
It secretes lacrimal fluid tear fluid a watery fluid isotonic to plasma onto the surface of the eyeball. Cohen AJ Mercandetti M Brazzo BG. The anterior and posterior lacrimal crests are formed by the maxillary and lacrimal bones respectively The medial orbital wall is formed from anterior to posterior by the.
The part of the lacrimal apparatus that forms the secretory system migrates laterally to the upper and outer conjunctival side of the upper eyelid. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features Press Copyright Contact us Creators. Anatomy of the lacrimal apparatus 1.
The lacrimal gland is primarily responsible for producing emotional or reflexive tears. Anatomy of the Lacrimal Canaliculus The lacrimal canaliculus is divided into the vertical and horizontal portions 1 2 6. Bony anatomy of the lacrimal sac fossa and medial orbital wall.
It forms tears when produced in excess. The lacrimal glands are serous type exocrine glands that secrete lacrimal fluid onto the surfaces of the conjunctiva and cornea of the eye. A thorough understanding of lacrimal system anatomy is essential for the successful management of the tearing patient.
ANATOMY OF THE LACRIMAL SYSTEM John L. Lacrimal fluid acts to the clean nourish and lubricate the eyes. The lacrimal fluid is 1 secreted and 2 distributed about the conjunctival sac and 3 its excess is excreted into the nose.
Publisher Name Springer New York NY Print ISBN 978-0-387-25385-5. The palpebral lobe measures about one-third the volume of the orbital lobe. A few glands acquire parasympathetic efferent innervation and form the main lacrimal gland and the accessory palpebral gland.
It therefore can be divided into a secretory system a distributional system and an excretory system. THE LACRIMAL SECRETORY SYSTEM. Wobig and Roger A.
Springer New York NY. A thorough understanding of the anatomy of the lacrimal system will further facilitate the chance of a successful surgical outcome. 32 6.
Frontal process of the maxilla. It is placed under the levator aponeurosis in the lateral part of the superior eyelid. Lacrimal ducts originate in orbital part of gland then traverses the palpebral part of gland to open into superior fornix of conjunctival sac.
1Lacrimal gland 2Lacrimal ducts 3Conjunctival sac 4Lacrimal puncta 5Lacrimal canaliculi 6Lacrimal sac and 7Naso lacrimal duct 3. APPLIED ANATOMY Lacrimal gland.
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