What is the structure of a paranasal sinuses?

Paranasal sinuses are a group of four, paired, air-filled spaces that surround the nasal cavity (maxillary sinuses), above the eyes (frontal sinuses), between the eyes (ethmoid sinuses), and behind the eyes (sphenoid sinuses). The sinuses are named for the facial bones that they are located behind.

What is the structure and function of paranasal sinuses?

They are centered on the nasal cavity and have various functions, including lightening the weight of the head, humidifying and heating inhaled air, increasing the resonance of speech, and serving as a crumple zone to protect vital structures in the event of facial trauma.

What are the 4 pairs of paranasal sinuses?

There are 4 pairs of the paranasal sinuses:

  • Maxillary sinuses (the biggest)
  • Frontal sinuses.
  • Ethmoidal air cells.
  • Sphenoid sinus.

What is the function of the paranasal?

The paranasal sinuses open into the nasal cavity (space inside the nose) and are lined with cells that make mucus to keep the nose from drying out during breathing.

What are the three characteristics of paranasal sinuses?

Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity. The maxillary sinuses are located under the eyes; the frontal sinuses are above the eyes; the ethmoidal sinuses are between the eyes and the sphenoidal sinuses are behind the eyes.

Which of the following is a true statement about the paranasal sinuses?

Which of the following is true about paranasal sinuses? Paranasal sinuses enhance the resonance of the voice and lighten the skull.

What are paranasal sinuses filled with?

Synonyms: Antrum of Highmore, Maxillary paranasal sinus , show more… The paranasal sinuses are paired and symmetrical, air-filled cavities situated around the nasal cavity. Paranasal sinuses are found in three bones of the neurocranium (braincase), the frontal bone, ethmoid bone, and sphenoid bone.

How do paranasal sinuses drain?

The paranasal sinuses are divided per their drainage systems into anterior sinuses group (maxillary, anterior ethmoid, and frontal sinuses) which drains into the middle meatus through the anterior ostiomeatal unit.

What epithelium is in the paranasal sinuses?

The sinus cavities are lined with pseudostratified, ciliated, columnar epithelium that is contiguous, via ostia, with the lining of the nasal cavity. This epithelium contains a number of mucus-producing goblet cells.

What is the purpose of the paranasal sinuses that connect with the nasal cavity quizlet?

The paranasal sinuses are air-filled pockets within the cranium. They are connected to the nasal cavity and serve to lighten the weight of the skull bones, serve as resonators for sound production, and provide mucus, which drains into the nasal cavity.

How are the sinuses connected?

Sinuses are air pockets that are located within the bones of the skull and face and are connected to your nasal passages by small tubes or channels, the osteomeatal complex. These channels permit air to flow from the nose into the sinuses and allow drainage of mucous from each sinus into the nose.

Which type of epithelial tissue is present in the nasal cavities and why?

Olfactory epithelium: The olfactory epithelium, located within your nasal cavity, contains olfactory receptor cells, which have specialized cilia extensions.