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💀anatomy and physiology i review

Maxillary Sinuses

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The maxillary sinuses are a pair of air-filled cavities located within the maxillary bones, the largest of the paranasal sinuses. They play an important role in the structure and function of the skull.

5 Must Know Facts For Your Next Test

  1. The maxillary sinuses are the largest of the paranasal sinuses, located in the maxillary bones just below the eyes.
  2. They play a role in humidifying and warming the air we breathe, as well as in resonance and voice production.
  3. The maxillary sinuses develop during childhood and continue to grow until around age 20.
  4. Inflammation or blockage of the maxillary sinuses can lead to the medical condition known as maxillary sinusitis.
  5. The maxillary sinuses are vulnerable to infection due to their proximity to the nasal cavity and the potential for bacteria and viruses to spread.

Review Questions

  • Describe the location and function of the maxillary sinuses within the skull.
    • The maxillary sinuses are a pair of air-filled cavities located within the maxillary bones, which form the upper jaw. They are the largest of the paranasal sinuses and serve important functions, such as humidifying and warming the air we breathe, as well as contributing to voice resonance. The maxillary sinuses develop during childhood and continue to grow until around age 20, at which point they reach their full size.
  • Explain the relationship between the maxillary sinuses and the nasal cavity, and how this can impact sinus health.
    • The maxillary sinuses are closely connected to the nasal cavity, as they share an opening that allows for airflow and drainage. This proximity means that infections or blockages in the nasal cavity can easily spread to the maxillary sinuses, leading to the medical condition known as maxillary sinusitis. The vulnerability of the maxillary sinuses to infection is due to this direct connection with the nasal cavity, which can facilitate the spread of bacteria and viruses.
  • Analyze the potential consequences of chronic or recurrent maxillary sinus issues and how they may impact an individual's overall health and well-being.
    • Chronic or recurrent problems with the maxillary sinuses, such as persistent inflammation or frequent infections, can have significant impacts on an individual's health and quality of life. Maxillary sinusitis can cause persistent nasal congestion, headaches, facial pain, and difficulty breathing, which can interfere with daily activities and lead to reduced productivity and social interactions. Additionally, untreated or poorly managed sinus issues can potentially spread to other areas of the body, increasing the risk of more serious complications. Proper diagnosis and effective treatment of maxillary sinus problems are crucial for maintaining overall health and well-being.