Lacrimal apparatus
Lacrimal Apparatus
The Lacrimal Apparatus (/ləˈkrɪməl/; from Latin lacrima meaning "tear") is a system in the human body that produces and drains tears. It is a part of the ocular system and plays a crucial role in maintaining the health and function of the eye.
Structure
The Lacrimal Apparatus consists of:
- Lacrimal gland: The primary function of this gland is to produce tears. It is located in the upper outer quadrant of the orbit.
- Lacrimal ducts: These are small channels that carry tears from the lacrimal gland to the conjunctiva.
- Lacrimal canaliculi: These are small canals that drain tears from the eye's surface into the lacrimal sac.
- Lacrimal sac: This is a dilated upper part of the nasolacrimal duct, and it collects tears from the canaliculi.
- Nasolacrimal duct: This duct allows the flow of tears from the lacrimal sac into the nasal cavity.
Function
The Lacrimal Apparatus is responsible for the production, distribution, and drainage of tears. Tears are essential for the lubrication of the eye, providing nutrients to the cornea and conjunctiva, and for the removal of potentially harmful debris.
Related Terms
- Dry eye syndrome: A condition that occurs when the lacrimal apparatus does not produce enough tears or when the tears evaporate too quickly.
- Dacryocystitis: An infection of the lacrimal sac, often caused by a blockage of the nasolacrimal duct.
- Epiphora: An overflow of tears onto the face, often due to an obstruction of the lacrimal apparatus.
External links
- Medical encyclopedia article on Lacrimal apparatus
- Wikipedia's article - Lacrimal apparatus
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