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Ethmoidal air cells: magnified reference view with a numbered learning marker. The complete original plate is available in the next view.
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Ethmoidal air cells

Small air spaces in ethmoidal labyrinths. Located between nasal cavity and orbit. Grouped into anterior, middle and posterior cells.

Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.

Ethmoidal air cells: magnified reference view with a numbered learning marker. The complete original plate is available in the next view.

Image: OpenStax College · Source / original · CC BY 4.0

Numbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.

Ethmoidal air cells

Ethmoid landmarks

Ethmoidal air cells

STRUCTURE & FUNCTION

Understand what you see.

Small air spaces in ethmoidal labyrinths.

Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.

01 / IDENTIFICATION

How to recognise it.

  1. Small air spaces in ethmoidal labyrinths
  2. Located between nasal cavity and orbit
  3. Grouped into anterior, middle and posterior cells
02 / KEY STRUCTURES

Point them out.

Tap a number to open its reference, zoom in and locate the structure. Numbers stay the same across views. This key follows landmarks visible in the reference images.

Related features & study points (3)

Additional relations, attachments or microscopic details to revise alongside this plate. These are separate from its numbered image landmarks.

  • Ethmoidal labyrinth
  • Lamina papyracea
  • Nasal meatuses
03 / VIVA PRACTICE

Think first. Then reveal.

Say your answer aloud before opening the suggested response.

Examiner-style prompts: identify the structure, explain its relations, then answer the applied follow-up. These are revision questions, not authenticated past papers.

01Identify ethmoidal air cells and justify your identification.
SUGGESTED ANSWER

Small air spaces in ethmoidal labyrinths. Located between nasal cavity and orbit. Grouped into anterior, middle and posterior cells.

02Where do posterior ethmoidal cells drain?
SUGGESTED ANSWER

Into the superior meatus; anterior and middle groups drain toward the middle meatus.

03Why can ethmoidal infection affect the orbit?
SUGGESTED ANSWER

The thin lamina papyracea forms much of the medial orbital wall and separates the orbit from ethmoidal air cells.

Read the references.

Credited anatomical plates, microscopy and university teaching references. Individual image credits appear below the viewer. Historical plates can use older terminology; use the lesson text for current names.