Ethmoid Bone Labeling Practice (Axial Skeleton)

Questions and Answers

What is the term for the bony ridge located in the ethmoid bone?

Crista Galli

What is the name of the horizontal bone plate in the ethmoid bone that contains olfactory foramina?

Cribriform Plate

What is the term for the complex structure of air-filled spaces located on the left side of the ethmoid bone?

Left Ethmoidal Labyrinth

What structure on the ethmoid bone helps to form the lateral walls of the nasal cavity?

Middle Nasal Concha Signup and view all the answers

What part of the ethmoid bone provides support for the nasal septum?

Perpendicular Plate Signup and view all the answers

What are the small air-filled spaces within the ethmoid bone called?

Ethmoidal Air Cells Signup and view all the answers

What is the name of the plate that forms the roof of the nasal cavity and the floor of the orbits?

Orbital Plate Signup and view all the answers

Study Notes

Ethmoid Bone Anatomy

Crista Galli: A vertical, triangular projection located in the midline of the cribriform plate; serves as an attachment point for the falx cerebri, a dural membrane in the brain.
Cribriform Plate: A perforated horizontal structure that forms the roof of the nasal cavity; contains olfactory foramina through which olfactory nerves pass to reach the nasal epithelium.
Left Ethmoidal Labyrinth: A complex, maze-like structure containing the ethmoidal air cells; contributes to the formation of the lateral walls of the nasal cavity.
Middle Nasal Concha: A curved bony structure that extends from the lateral wall of the nasal cavity; it helps to increase surface area for airflow and is involved in conditioning inhaled air.
Perpendicular Plate: A thin bony structure that descends from the cribriform plate and forms part of the nasal septum, thereby separating the left and right nasal cavities.
Ethmoidal Air Cells: Small air-filled spaces located within the ethmoidal labyrinth; these cells are involved in the drainage of mucus and connected to the nasal cavity, playing a role in sinus function.
Orbital Plate: A horizontal, thin bony layer that forms part of the eye socket; it separates the orbits from the nasal cavity and is critical for protecting the eyes.

Description

Test your knowledge of the ethmoid bone with this labeling practice quiz. Each card presents a term related to the ethmoid bone, including the crista galli and ethmoidal air cells. Perfect for students studying human anatomy or preparing for assessments on the axial skeleton.