Overview of the ethmoid bone

The tutorial discusses the ethmoid bone, a singular porous bone in the skull's mid-facial region. It details the bone's structure, including the perpendicular plate, ethmoid labyrinths, and cribriform plate. The ethmoid bone forms parts of the nasal cavity and orbit, and connects with 15 other skull bones. The cribriform plate allows olfactory nerve passage, and the ethmoid bone's central location is crucial for its connections.

What is the primary function of the ethmoid bone in the skull?

• To anchor the tongue

• To form the mid-facial region

• To protect the brain

• To support the jaw

Which structures are formed by the ethmoid labyrinths?

• The ear canals

• The eye sockets

• The lower jaw

• The superior and middle nasal conchae

What is the role of the hiatus semilunaris?

• To anchor the teeth

• To support the nasal septum

• To connect the frontal and maxillary sinuses

• To separate the brain hemispheres

What is the significance of the cribriform plate in the ethmoid bone?

• It protects the brain

• It supports the jaw

• It forms the roof of the nasal cavity

• It anchors the tongue

How many other bones does the ethmoid bone contact within the skull?

• 18

• 15

• 12

• 10