Sinus meaning yahoo mail
A curious question!
When you search for "sinus meaning" on Yahoo Mail, I'm assuming you're looking for the meaning of "sinus" in the context of anatomy or medicine.
In anatomy, a sinus refers to a cavity or channel within the body that is usually filled with air or fluid. There are several types of sinuses in the human body, including:
- Paranasal sinuses: These are air-filled cavities in the skull that connect to the nasal passages. They help to warm, humidify, and filter the air we breathe.
- Maxillary sinus: This is the largest of the paranasal sinuses, located in the cheekbone.
- Frontal sinus: This sinus is located in the forehead and is responsible for draining mucus from the nasal passages.
- Ethmoid sinus: This sinus is located between the nasal passages and the orbits of the eyes.
- Sphenoid sinus: This sinus is located in the sphenoid bone, which is located behind the nasal passages.
In medical contexts, sinus can also refer to a condition where the sinuses become inflamed or infected, leading to symptoms such as headaches, facial pain, and nasal congestion. This condition is commonly known as sinusitis.
I hope this helps clarify the meaning of "sinus" in the context of anatomy and medicine!