Lacrimal sac

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Science and technology

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What Wikipedia says

The lacrimal sac or lachrymal sac is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla.

Excerpt from the Wikipedia article “Lacrimal sac”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Dr. Johannes Sobotta, Public domain, via Wikimedia Commons.