Nose Flashcards
Bony nasal aperture
Rostral opening of the nose
Nostrils aka?
Nares
Philtrum
Separates nostrils from each other
Apex of nose is what type of epidermis?
Thickened cornified epidermis
Glands in apex of nose
None in dog
Surface of nasal plane is moistened by?
Secretion of lateral nasal gland
What is nasal cartilage?
Support of external nose → moveable
5 nasal cartilages
- Septal c. of nose
- Dorsolateral nasal c.
- Ventrolateral nasal c.
- Lateral accessory nasal c.
- Medial accessory nasal c.
Septal c. of nose
Perpendicular medial plate separating most of nasal cavity into right and left nasal fossae
Dorsolateral nasal c.
Most expansive c. in mobile part of external nose → joins dorsal part of bony nasal aperture caudally
Ventrolateral nasal c.
Continuation of rostral lateral half of septal c. → rostrally runs into apex of nose
Lateral accessory nasal c.
Supports nostril ventrally
Medial accessory nasal c.
Arises from ventral nasal concha and ventrolateral nasal c. → extends rostrally inside alar fold
2 lig. of nose
- Dorsal nasal lig.
2. Lateral nasal lig.
Which lig. of nose is paired?
Lateral nasal lig. (one of each side)
Ligs. of nose run from ___ to?
Dorsolateral nasal c. → nasal b. (dorsal or lateral surfaces)
Nasal cavity extends from ___ to ?
Nostrils → chonae
Parts of nasal cavity
- Nasal septum
- Nostril
- Nasal vestibule
- Nasal conchae
- Nasal meatuses
3 portions of nasal cavity
- Osseous portion
- Rostral and cd. cartilagenous portions
- Membranous portion
Borders of osseous portion of nasal septum
Caudally: ethmoid b.
Dorsally: frontal and nasal b.
Ventrally: vomer b.
Which cartilaginous portion of nasal cavity is movable?
Rostral
Origin of cd. cartilaginous portion of nasal cavity
Ethmoid b.
Nostril is wider ____
Dorsomedialy than ventrollateraly
Wing of nostrils contains?
Much of dorsolateral and accessory nasal cc.
Most mobile portion of nostril
Wing of nostrils
Nasal vestibule is the common opening for the?
- External nose
- Nasolacrimal duct
- Duct of the lateral nasal gland
Nasal vestibule houses?
Alar fold
What is alar fold?
Rostral extension of ventral nasal concha
Nasal conchae
Cartilagenous (or slightly ossified) scrolls covered by nasal mucosa → occupy most of nasal cavity
3 nasal conchae
- Dorsal nasal conhae
- Ventral nasal conchae
- Middle (ethmoidal) nasal conchae