MEDIVEERSETHE PRACTICAL HUB
Muscular complex surrounding the oral aperture. Fibres blend with other perioral muscles. Acts as an oral sphincter.
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Orbicularis oris: 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 4.0Numbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.
Orbicularis oris
Understand what you see.
Muscular complex surrounding the oral aperture.
Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.
How to recognise it.
- Muscular complex surrounding the oral aperture
- Fibres blend with other perioral muscles
- Acts as an oral sphincter
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.
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 orbicularis oris and justify your identification.+
Muscular complex surrounding the oral aperture. Fibres blend with other perioral muscles. Acts as an oral sphincter.
02What is its action?+
Closes and protrudes the lips, contributing to speech and oral competence.
03What is its motor nerve?+
Facial nerve VII.
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.