Nasal Cavity

There are 4 types of paranasal sinuses:

1) maxillary 2) frontal 3) ethmoidal 4) sphenoid

The lateral boundary of the nasal cavity is formed by these 7 bones:

1) nasal 2) lacrimal 3) ethmoid 4) inferior nasal concha (or turbinate) 5) palatine 6) medial pterygoid plate of sphenoid 7) maxilla

The three nasal conchae:

1) superior nasal concha (part of ethmoid) 2) middle nasal concha (part of ethmoid) 3) inferior nasal concha (a separate bone)

The choanae is formed posteriorly by:

1) vomer (medially) 2) Palatine bone (inferiorly) 3) Medial pterygoid plate of sphenoid (laterally) 4) Body of sphenoid (superiorly)

The nasal septum is formed by 3 structures:

1) vomer (posteriorly and inferiorly) 2) perpendicular plate of the ethmoid (superiorly) 3) septal cartilage (anteriorly)

in the lower half, the composition is skin and muscle (nasalis) covering cartilage, the following are the cartilages of the external nose:

1. septal cartilage 2. lateral expansion of septal cartilage 3. greater alar cartilage, which is bent so it forms the medial and lateral walls of the nares. 4. possibly several smaller cartilages

laterally, the nose consists of skin termed the ___.

ala

The superior boundary or roof of the nasal cavity is formed by four bones:

anterior to posterior: 1) nasal 2) frontal 3) ethmoid (cribriform plate) 4) sphenoid (body)

The ___ is the tip of the nose.

apex

the part of the nasal cavity just above the limen nasi is the ___.

atrium

The choanae is a ....

bony aperture formed posteriorly by several bones.

The upper part of the dorsum is termed the ___ of the nose.

bridge

The nasal cavity is open to the nasopharynx posteriorly via the ___.

choanae

The ___ is the superior aspect of the nose, covered by skin

dorsum

The respiratory region functions in:

dust removal from inspired air, as well as warming and humidifying incoming air.

The ___ sinus consists of numerous air cells collectively referred to as the ___.

ethmoidal (labyrinthine) sinus, ethmoidal labyrinth

The anterior ethmoidal sinus opens to the ___ of the middle meatus.

ethmoidal bulla

The middle meatus, located just below the middle nasal concha, contains an elevation/bulge of bone called the:

ethmoidal bulla, which is bounded inferiorly by a semilunar slit, known as the semilunaris

The ____ is also a single sinus on each side of the head, contained within the___ bone in the supraorbital area. This sinus also opens to the middle meatus.

frontal, frontal

Skin located here (in vestibule) contains ___ and ___.

hairs and sebaceous glands

The maxilla and the palatine also make up the ___, which separate the nasal cavity from the ___.

hard palate, oral cavity

The frontal sinus opens to the ___ of the middle meatus.

hiatus semilunaris

The maxillary sinus opens to the ___ of the middle meatus.

hiatus semilunaris

The nasolacrimal duct opens into the ___.

inferior meatus

The vestibule is limited above by a curved elevation, the ____.

limen nasi

The inferior boundary or floor of the nasal cavity is formed by the ___ anteriorly and the ___ bone posteriorly.

maxilla, palatine

The ___ is the largest paranasal sinus and is located within the ___.

maxillary, maxilla

The space inferior to each concha is termed a ___.

meatus; the superior meatus is located just below the superior nasal concha.

The nasal cavity is divided by a ___ into two chambers, the ___ and the ___, which are open anteriorly to the nares.

median nasal septum, right nasal cavity, left nasal cavity

Anterior ethmoid air cells open into the:

middle meatus

The maxillary sinus opens into the nasal cavity in the ___.

middle meatus

At the limen nasi, the skin of the vestibule gives way to the ___ of the nasal cavity

mucous membrane

The inferior aspect of the nose contains two openings, the ___ or ____.

nares or nostrils

In the upper half of the external nose, the composition is skin and muscle (procerus) covering bone, the bone being the ___.

nasal bone

The ___ is a space between the cranial cavity superiorly and the oral cavity inferiorly.

nasal cavity

The lateral cavity is characterized by the presence of the three ___.

nasal conchae or turbinates

The medial boundary of the nasal cavity is composed of the ___.

nasal septum

In the olfactory region, the filaments of the ___ are distributed, mediating olfaction or the sense of smell.

olfactory nerve

The ___ is the mucous membrane in the upper third of the nasal septum and the superior concha.

olfactory region

The sinus itself is lined with mucous membrane and will communicate with the nasal cavity via a canal/space termed an ___.

opening

When the cartilages of the external nose are removed, the dried skull presents another bony aperture called the ___. It is bounded by the nasal bones superiorly and the maxilla laterally and inferiorly.

piriform aperture

The maxillary sinus is a single chamber and ___ in shape. The floor of this sinus is ___ to the upper teeth.

pyramidal, adjacent

The lower two-thirds of the mucous membrane of both the lateral and the medial walls constitute the ___ of the mucous membrane.

respiratory region

The ___ is the base of the nose, where it attaches to the face.

root

The sphenoid sinus opens into the ___, which is the area above the superior nasal concha.

sphenoethmoidal recess

The sphenoid sinus opens to the ___, posterior to the superior meatus.

sphenoethmoidal recess

The ___ is a single sinus on each side, both contained within the body of the sphenoid.

sphenoid sinus

Posterior ethmoid air cells open into the:

superior meatus

A sinus is a ___.

true cavity within bone

The posterior ethmoidal sinus opens to the ___ of the superior meatus.

unnamed opening

Just inside the nares is a space called the ___, also bounded laterally and medially by the ___.

vestibule, greater alar cartilage