The Lacrimal Sac

The Lacrimal Sac


The Lacrimal Sac is a small hole in your eyelids that drains tears to your nose. It's the reason why you get a runny nose after crying.


share Share

The lacrimal glands are serous type exocrine glands that secrete lacrimal fluid onto the surfaces of the conjunctiva and cornea of the eye. The Lacrimal fluid acts to clean, nourish and lubricate the eyes. It forms tears when produced in excess.

The lacrimal apparatus is the system responsible for the drainage of lacrimal fluid from the orbit. After secretion, lacrimal fluid circulates across the eye and accumulates in the lacrimal lake located in the medial canthus of the eye. From here, it drains into the lacrimal sac via a series of canals.

The lacrimal sac is the dilated end of the nasolacrimal duct and is located in a groove formed by the lacrimal bone and frontal process of the maxilla. Lacrimal fluid drains down the nasolacrimal duct and empties into the inferior meatus of the nasal cavity.


Blood Cell Production

2-3 million blood cells are produced in the human body every second.

Read More
Water Amount in Human Brain

The average human brain contains around 78% water.

Read More
Breathing

You take over approximately 23,000 breaths every day.

Read More
DNA

If your DNA was stretched out it would reach the moon 1500 times.

Read More