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Doctors Medicines MCQs Q&A

All are sinuses and belong to paranasal sinuses, except:

All are sinuses and belong to paranasal sinuses, except: Correct Answer Mastoid

Explanation:

Mastoid is a bone present in the ear. The remaining others are paranasal sinuses. Paranasal sinuses are a group of air-filled spaces that surround the nasal cavity. There are four paranasal sinuses named after the bone where it is located.

Ethmoidal: Located between the eyes

  • Sphenoidal: Located behind the eyes
  • Maxillary: Located under the eyes
  • Frontal: Located above the eyes

The functions of the sinuses are:

  • Lighten the skull
  • Improve our voices
  • produce mucus that moisturizes the inside of the nose. The mucus layer protects the nose from pollutants, microorganisms, dust and dirt.

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