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Superiorconcha andmeatus

Middle

concha andmeatus

Inferiorconcha

andmeatus

Maxillarysinus

Ethmoid sinuses

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Hard palate

Opening for maxillary

sinus

Sphenoid sinus

Sphenoethmoidal recess

Posterior ethmoid

Middle ethmoid- on

bulla

Ant.

ethmoidal

Frontal

sinus

Infundibulum

from frontal

nasolacrimal

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sphenoid

posterior

middle

anterior

Infundibulum from frontalCrista galli

Cribriform plate

Lacrimal bone

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Ant.

ethmoidal

Lacrimal sac

Lacrimal ductsporse

Floor of nose

inferior

m

i

d

d

l

e

maxillary

Opening of duct

Nasolacrimal duct

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