To locate: The site of sinuses. Introduction: A sinus is a cavity or air filled spaces present in the nostrils. There are four sinuses presents in the nostrils. These sinuses are located within the frontal, sphenoid, ethmoid and maxillary bones of skulls. These sinuses are present around the nasal cavity, therefore called as the paranasal sinuses.

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Chapter 19, Problem 5P

Summary Introduction

To locate:

The site of sinuses.

Introduction:

A sinus is a cavity or air filled spaces present in the nostrils. There are four sinuses presents in the nostrils. These sinuses are located within the frontal, sphenoid, ethmoid and maxillary bones of skulls. These sinuses are present around the nasal cavity, therefore called as the paranasal sinuses.

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