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 is the primary function of the lacrimal bone in the skull?

• To protect the nasal cavity

• To form part of the orbit

• To support the brain

• To anchor the jaw muscles

Which anatomical term is used to describe the surface of the lacrimal bone that faces the nasal cavity?

• Facies Nasalis

• Facies Orbitalis

• Facies Medialis

• Facies Lateralis

What structure is housed within the lacrimal fossa?

• Nasal concha

• Ethmoid cells

• Lacrimal sac

• Lacrimal gland

The nasolacrimal canal connects the lacrimal fossa to which part of the nasal passage?

• Lower nasal passage

• Middle nasal passage

• Upper nasal passage

• Ethmoid sinus

Which bone does the lacrimal bone articulate with in the nasal cavity?

• Ethmoid bone

• Inferior nasal concha

• Frontal bone

• Maxilla