What Are Paranasal Sinuses?

Paranasal sinuses are a group of four paired cavities in the skull.

The human skull consists of 22 bones that articulate and protect the brain. The bones of the skull are divided into two parts: the cranium and the facial skeleton. The cranium houses and protects the brain, while the facial skeleton provides support for the features of the face. Each side of the skull has eight bones: two parietal bones, two temporal bones, one occipital bone, one sphenoid bone, and one ethmoid bone. The paranasal sinuses are a group of four paired cavities in the skull that are located between and behind the eyes and nose.

The sinuses play an important role in the immune system and help to humidify and warm air as it enters the lungs.

When most people think of the sinuses, they think of them as simply cavities in the head that cause pain and congestion. However, what many people don’t know is that the sinuses play an important role in the immune system and help to humidify and warm air as it enters the lungs. The sinuses are lined with mucous membranes that produce mucus, which helps to trap bacteria and other particles and keep them from entering the lungs. Sinus infections can be caused by a variety of factors, including allergies, colds, or viruses. Symptoms of a sinus infection can include headache, facial pain, fever, congestion, and a runny nose.

The sinuses are located behind the nose and above the eyes.

The sinuses are four pairs of air-filled cavities in the skull. They are located behind the nose and above the eyes. The sinuses are lined with mucous membranes that produce mucus. Mucus traps bacteria, dust, and other foreign particles. It also helps to humidify and warm the air as it is breathed in.

There are four types of paranasal sinuses – frontal, maxillary, ethmoidal, and sphenoidal.

Paranasal sinuses are small, air-filled cavities located behind each of the frontal bones of the skull. They provide an important route for drainage of cerebrospinal fluid (CSF), and are also involved in the transmission of smells and sounds. Sinuses can become inflamed or infected, which can lead to a variety of symptoms, including headache, fever, and nasal congestion.

Sinus infections are the most common disorder of the sinuses.

A sinus infection, also known as sinusitis, is an inflammation of the mucous membranes that line the sinuses. Sinus infections are the most common disorder of the sinuses. They are usually caused by a viral or bacterial infection, but can also be caused by allergies. Symptoms of a sinus infection include headache, facial pain, nasal congestion, and fever. Treatment for a sinus infection depends on the cause. Viral infections can be treated with over-the-counter medications, while bacterial infections require antibiotics.

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