Lacrimal punctum
Lacrimal punctum
Lacrimal punctum (pronunciation: /ˈlækrɪməl ˈpʌŋktʊm/) is a part of the tear drainage system in the human body. It is also known as the tear duct.
Etymology
The term "lacrimal punctum" is derived from the Latin words "lacrima" meaning "tear" and "punctum" meaning "point".
Anatomy
The lacrimal punctum is a small hole located at the inner corner of the eye, on the edge of the upper eyelid and lower eyelid. It is the opening to the lacrimal canaliculi, which are small channels that drain tears from the eye's surface into the lacrimal sac, and then into the nasolacrimal duct, which leads to the nasal cavity.
Function
The primary function of the lacrimal punctum is to drain tears from the eye. This helps to keep the eye moist and remove any debris that may have entered the eye.
Related Terms
- Lacrimal apparatus: The collective term for the structures that produce and drain tears.
- Lacrimal gland: The gland that produces tears.
- Lacrimal sac: The sac where tears are collected before being drained into the nasolacrimal duct.
- Nasolacrimal duct: The duct that carries tears from the lacrimal sac to the nasal cavity.
See Also
External links
- Medical encyclopedia article on Lacrimal punctum
- Wikipedia's article - Lacrimal punctum
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