Upper Respiratory Passageways 1 - Comparative

M.9, W.1, OP.1

Which of the following lists bones A, B, C, and D in the correct order?

A. Frontal, Incisive, Nasal, Maxilla

B. Nasal, Frontal, Incisive, Maxilla

C. Frontal, Maxilla, Nasal, Incisive

D. Incisive, Frontal, Maxilla, Nasal

Frontal, Incisive, Nasal, Maxilla

Identify the bones that form the hard palate in this image (from rostral to caudal).

A. Palatine, Maxilla, Incisive

B. Palatine, Incisive, Maxilla

C. Incisive, Maxilla, Palatine

incisive, maxilla, palatine

Identify structures labelled A and B

A - Vomer

B - Nasal Conchae / Turbinate’s

what is a nasal aperture and bones form it

bony entrance to nasal cavities

nasal and incisive bones

Identify structures labelled A and B

A - Cribriform plate

B - Frontal sinuses

what passes through the cribriform plate?

olfactory nerves from olfactory bulb

what do the olfactory nerves that pass through the cribriform plate innervate?

olfactory epithelium of the ethmoidal and middle conchae

what does each frontal sinus compartment communicate with and how?

communicates directly with nasal cavity

through series of small passageways

each frontal sinus divides into what 3 compartments?

• rostral

• medial

• lateral

what do the three frontal sinus compartments open into?

an ethmoidal meatus

which compartment tends to be larger?

lateral compartment

what is located in the maxilla in canines?

a recess/depression called the Maxillary recess

what is located in the mucosa of the maxillary recess?

lateral nasal glands

what does the canine NOT have in the maxillary area?

NO Maxillary sinus

Describe the features of the feline skull

• short nasal passages

• single frontal sinus in each of the frontal bones 

• shallow maxillary recess in each maxilla 

Match the labels on this image to the correct bone listed below:

• Incisive

• Frontal bone

• Vomer

• Nasal bone

• Maxilla

A - Nasal bone

B - Frontal bone

C - Vomer

D - Incisive

E - Maxilla