smallest and most fragile bone of the human skull and face
The lacrimal bone is the smallest bone in the face; about the size of the little fingernail. It is at the front of the inside wall of the eye socket.
|Anatomical terms of bone|
The lacrimal bone is involved in crying. It is part of the tear duct, where tears drain from the eye. The lacrimal sac is where tears flow when you cry. The tears then go down a duct inside the nose. This is why you can get a runny nose from crying. 
- ↑ Maliborski, Artur; Różycki, Radosław (17 April 2014). "Diagnostic imaging of the nasolacrimal drainage system. Part I. Radiological anatomy of lacrimal pathways. Physiology of tear secretion and tear outflow". Medical Science Monitor : International Medical Journal of Experimental and Clinical Research. 20: 628–638. doi:10.12659/MSM.890098. PMC 3999077. PMID 24743297.
- ↑ Anatomy and Physiology Saladin, 7e 2015