PARANASAL SINUSES. Using your illustrations/models, explain in one or more video
ID: 3508223 • Letter: P
Question
PARANASAL SINUSES. Using your illustrations/models, explain in one or more videos the general structure and function of the paranasal sinuses. Describe their location and their connection with the nasal cavity. a. Illustrate these concepts by explaining the basics about sinusitis. What is sinusitis? What are its common causes? (include sport-related or trauma-related causes. b. Use the following case to illustrate the connection of the nasal and paranasal sinuses. i. Daniel gets into a fight at a sports event and receives a broken nose. He is taken to the hospital and x-rays were performed. About 10 days later, after his nose heals, he starts to have sinus pain and discomfort in the area around the maxillae. What is probably the cause of Daniel’s discomfort? Using your knowledge about the anatomy of the cranial and facial bones, explain the sequence of events (step by step) that took place to develop the condition Daniel is suffering now.
Explanation / Answer
Ans: Paranasal sinuses develop as outgrowths of the nasal cavity. Paranasal sinuses is a air containing spaces within the skull that communicate with the nasal cavity. Air-filled cavities located in the frontal, ethmoid and sphenoid bones of the cranium, as well as the maxilla of the face.
Paranasal sinuses characteristics:
1. all covered with mucus,
2. paired,
3. continuous with nasal cavity.
The paranasal sinuses a formation from the nasal mucosa and their continued communication with the nasal fossae. The five functions of the paranasal sinuses:
-serves as a resonating chamber for the voice
-decreases the weigh of the skull by containing air or lightens the skull
-helps to warm and moisten inhaled air
-acts as shock absorbers in trauma
-possibly controls the immune system
Four groups are the paranasal sinuses divided into maxillary, frontal. ethmoid (many) and sphenoid (2). Maxillary sinuses show some development by birth. Frontal, ethmoidal and sphenoid sinuses usually show some development by the first two years of life. All sinuses show gradual enlargement up to adulthood, but the degree of development and symmetry can vary substantially.
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