ANA 201University of IbadanNov 2, 2026
2. NOSE
Structure
8 Concept Stages
Practice Exam
91+ Questions
Active Recall
Exam-Matched
Executive Topic Summary
Interactive mental model study tree.
High-Yield Exam Takeaways
- External Nose: Structure, Skeleton, and Surface Landmarks
- Internal Nasal Septum: The Great Divider and Its Clinical Dangers
- Muscles, Nerves, and Blood Supply of the External Nose
- Nasal Cavity: Architecture, Regions, and Functional Zones
- Nasal Cavity Boundaries and the Conchae Labyrinth
- Drainage Pathways: Where Sinuses and Tears Empty
- Gateways, Vessels, and Nerves: The Complete Supply Map
- Paranasal Sinuses: Air Spaces, Drainage, and Clinical Disease
Study Tree Preview (Bite-Sized Concepts)
1External Nose: Structure, Skeleton, and Surface Landmarks
5 Micro-BitesWhat Is the External Nose and Where Does It Sit?:Let's start with the obvious part you can see in the mirror. The <term def="the visible part of the nose that sticks out from your face">external nose</term> is the part that proje...
The Nostrils and Their Winged Borders:Flip your view to the bottom of your nose. The <term def="the two openings at the bottom of your nose that lead into the nasal cavity">nares</term> or nostrils pierce through the i...
2Internal Nasal Septum: The Great Divider and Its Clinical Dangers
5 Micro-BitesThe Septum: Bone Behind, Cartilage in Front:The <term def="the wall that divides your nasal cavity into left and right sides">nasal septum</term> is your nose's central partition. It has a <term def="the rigid back portion o...
Saddle Nose: When Support Collapses:Here's a clinical pearl you'll see on exams. <term def="a collapsed nose deformity where the bridge sinks down due to loss of septal support">Saddle nose</term> happens when the <t...
3Muscles, Nerves, and Blood Supply of the External Nose
5 Micro-BitesThe Three Nose Movers: Tiny Muscles, Big Expressions:Your nose has three small muscles that create facial expressions. The <term def="the muscle between your eyebrows that pulls them down and wrinkles your nose bridge">procerus</term...
Sensation: The Trigeminal Nerve Takes Over:Feeling in your nose comes from two branches of the <term def="the fifth cranial nerve controlling sensation and chewing in your face">trigeminal nerve (CN V)</term>. The <term def...
Sample Practice Questions (Active Recall)
Q1.Which structure forms the superior boundary of the external nose's bony framework?
APerpendicular plate of the ethmoid
BNasal bones
CNasal part of the frontal bone
DFrontal process of the maxilla
Q2.Which muscle is responsible for depressing the medial eyebrows and wrinkling the skin over the nasal dorsum?
ADepressor septi nasi
BLevator labii superioris
CNasalis
DProcerus
Q3.Which clinical condition represents the most serious potential consequence of infection within the danger triangle of the face?
ACerebral abscess formation
BOrbital cellulitis
CSeptic cavernous sinus thrombosis
DMeningoencephalitis
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