What drains the frontal sinus?

The middle meatus drains the frontal, anterior ethmoid, and maxillary sinuses. The inferior meatus contains the orifice of the nasolacrimal duct. The ethmoid infundibulum is a pyramidal space that facilitates the drainage of the maxillary, anterior ethmoid, and frontal sinuses.

What is the function of the frontal sinus?

The frontal sinuses are lined with cells that make mucus to keep the nose from drying out. Anatomy of the paranasal sinuses (spaces between the bones around the nose).

Where does the frontal sinus open?

Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid. These structures then open into the semilunar hiatus in the middle meatus.

What are the 4 sinuses?

Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose).

What is frontal sinus aplasia?

Frontal sinus aplasia is defined as the absence of frontal bone pneumatization with no ethmoid cells extending above a line tangential to the supraorbital margin (horizontal line).

What are 2 Functions of the sinuses?

Purposes of the Sinuses The sinuses lighten the skull or improve our voices, but their main function is to produce a mucus that moisturizes the inside of the nose. This mucus layer protects the nose from pollutants, micro-organisms, dust and dirt.

Are frontal and maxillary sinuses connected?

Your cheekbones hold your maxillary sinuses (the largest). The low-center of your forehead is where your frontal sinuses are located. Between your eyes are your ethmoid sinuses.

What are the 5 sinuses?

The paranasal sinuses include the following types of sinuses:

• A maxillary sinus in each cheek.
• Between six and 12 ethmoid sinuses on each side of the nose between the eyes.
• A frontal sinus on each side in the forehead.
• A pair of sphenoid sinuses behind the ethmoid sinuses.

Which sinus is present at birth?

There are four different types of sinuses: Ethmoid sinus. Located inside the face, around the area of the bridge of the nose. This sinus is present at birth, and continues to grow.

Which sinuses are absent at birth?

The frontal sinuses are the only sinuses consistently absent at birth. Their development is variable: it begins during the first few years of life and completes in adolescence.