2.4 The Nasal Cavity and Paranasal Air Sinuses Flashcards
What kind of Epithelium forms the Respiratory Mucosa which lines most of the Nasal Cavity?
Ciliated Pseudostratified Columnar Epithelium
What is the roof of the Nasal Cavity lined with?
Olfactory Nerves
Which Cranial Nerve innervates the Mucosa which lines the Nasal Cavity?
The Olfactory Nerve (Cranial Nerve I)
This is therefore responsible for the sense of smell
Which plate of bone do axons of the Olfactory Nerve pass through to enter the Cranial Cavity?
The Cribriform Plate of the Ethmoid Bone
What are the 3 projections which are in the Lateral Wall of the Nasal Cavity?
- Superior Concha
- Middle Concha
- Inferior Concha
What is the space inferior to an Concha called?
A Meatus
What lies directly underneath the Superior Concha?
The Superior Meatus
What lies directly underneath the Middle Concha?
The Middle Meatus
What lies directly underneath the Inferior Concha?
The Inferior Meatus
What lies directly superior to the Superior Concha?
The Sphenoethmoid Recess
The Inferior Concha is a bone by itself, what bone are the Superior and Middle Conchae formed from?
The Ethmoid Bone
What Arteries supply the Nose?
Branches of the Ophthalmic Artery (A branch of the Internal Carotid Artery)
Branches of the External Carotid Artery
What is the Venous drainage of the Nose
The Nose is drained via a Venous Plexus
What implications does a rich vascular supply to the Nasal Cavity have for a common clinical condition?
Epistaxis (A Nose Bleed) - Especially in the very heavily vascularised “Little’s Area”
What are Paranasal Air Sinuses?
Air filled extensions of the “Respiratory Part” of the Nasal Cavity