Os lacrimale (Tränenbein)

The video tutorial explains the OS Lacrimale, the smallest bone in the skull, located in the orbit. It covers the differences between its lateral and medial surfaces, the structure and function of the lacrimal fossa and sac, and its contribution to the nasal passages and ethmoid cells. The tutorial also discusses the articulations and boundaries of the OS Lacrimale with other bones.

What are the differences between the lateral and medial surfaces of the OS Lacrimalis?

Explain the significance of the lacrimal sac in the drainage of tear fluid.