What is the function of the ethmoidal sinus?
A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.
What are 4 functions of the sinuses?
The possible roles of the sinuses may include reducing the weight of the skull; dampening pressure; humidifying and warming inspired air; absorbing heat and insulating the brain; aiding in sound resonance; providing mechanical rigidity; and increasing the olfactory surface area.
What is para nasal sinusitis?
Paranasal sinusitis is an inflammation of the mucous membranes in the paranasal sinuses. The sinuses are cavities in the facial bones next to, behind and above the nose. All paranasal sinuses are connected to the nasal cavities and lined with mucous membrane.
What is ethmoidal air cell?
The ethmoidal air cells, also known less commonly as the ethmoidal sinuses, form one of the four pairs of paranasal sinuses. They are located within the single, midline ethmoid bone.
Where does Ethmoidal sinus drain?
The ethmoid sinuses are within the ethmoid bone and are divided into two compartments, the anterior and posterior. The anterior ethmoid sinus drains into the middle meatus, and the posterior ethmoids drain into the sphenoethmoidal recess.
What are the 4 pairs of sinuses?
Four sets of paired sinuses are recognized: maxillary, frontal, sphenoid, and ethmoid (see the image below).
How many ethmoidal air sinuses are there?
Ethmoid Sinuses [21] There are 3 to 4 ethmoid air cells at birth that develop into 5 to 15 paired cells by adulthood with a total volume of 2 to 3 mL. They are located between the eyes, on either side of the septum. The anterior ethmoid cells drain into the ethmoid infundibulum, in the middle meatus.
What is the difference between air cells and sinuses?
The ethmoid sinuses or ethmoid air cells of the ethmoid bone are one of the four paired paranasal sinuses. The cells are variable in both size and number in the lateral mass of each of the ethmoid bones and cannot be palpated during an extraoral examination….
| Ethmoid sinus | |
|---|---|
| FMA | 84115 |
| Anatomical terms of bone |
What is drainage of sinus?
Sinus drainage is a natural process, so a person cannot prevent it. The sinuses drain down the back of the throat and into the stomach. Each time a person swallows, they are swallowing some mucus. Symptoms occur when there is an excessive amount of mucus, and the mucus is unusually thick.