What does sinus mean in anatomy?

A sinus is defined as: A channel that is not a blood or lymphatic vessel that allows for the passage of blood or lymph, such as found in the placenta, sinuses, or the cerebral meninges. A cavity or hollow space in bone or other tissue.

Where is the maxillary sinus located?

nose
A type of paranasal sinus (a hollow space in the bones around the nose). There are two large maxillary sinuses, one in each of the maxillary bones, which are in the cheek area next to the nose. The maxillary sinuses are lined with cells that make mucus to keep the nose from drying out.

Where do each sinus drain?

Each air cell drains through its own ostium, with anterior ethmoid air cells drain into the middle meatus and the posterior ones drain into the superior meatus [26].

Where does sphenoid sinus drain to?

[19] The sphenoid ostium drains into the sphenoethmoidal recess located within the superior meatus. The ethmoid bone is formed by a multitude of cells with an intricated structure, through which all the paranasal sinuses drain.

Where is the sinus located?

The paranasal sinuses are located in your head near your nose and eyes. They are named after the bones that provide their structure. The ethmoidal sinuses are located between your eyes. The maxillary sinuses are located below your eyes.

Where are the 4 sinuses located?

Your cheekbones hold your maxillary sinuses (the largest). The low-center of your forehead is where your frontal sinuses are located. Between your eyes are your ethmoid sinuses. In bones behind your nose are your sphenoid sinuses.

Are sinuses behind bone?

The front, or anterior, wall is thick skull bone; behind the sinuses lies bone covering the brain, and the floor of the sinuses slopes toward their openings into the nose.

Are there sinuses in your neck?

The sphenoid sinus is a deep sinus situated in the middle of your skull towards the back of your head and behind your eyes. If you naturally have a large sphenoid sinus, it can reach past your occipital bone and the pain felt from any pressure in this sinus can extend down into your neck.

Where is sphenoid sinus pain felt?

The main symptom of sinusitis is a throbbing pain and pressure around the eyeball, which is made worse by bending forwards. Although the sphenoid sinuses are less frequently affected, infection in this area can cause earache, neck pain, or an ache behind the eyes, at the top of the head, or in the temples.

Which bone contains a sinus?

Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose).

Where are all sinuses located?

The ethmoidal sinuses are located between your eyes. The maxillary sinuses are located below your eyes. The sphenoidal sinuses are located behind your eyes. The frontal sinuses are located above your eyes.

What are the sinuses in the skull?

The sinuses are a connected system of hollow cavities in the skull. The largest sinus cavities are about an inch across. Others are much smaller. Your cheekbones hold your maxillary sinuses (the largest). The low-center of your forehead is where your frontal sinuses are located.

What is the anatomy of the shoulder joint?

shoulder joint anatomy shoulder joint anatomy. Bones (Scapula, Humerus, Coracoid process, Acromion , Muscle (Biceps, Supraspinatus) and ligament (Coracohumeral) shoulder anatomy stock illustrations shoulder joint anatomy.

How many professional sinus anatomy photos are there?

Browse 226 professional sinus anatomy stock photos available royalty-free. Fracture zygoma and floor of orbit. CT scan of a skull of an traumatic brain injuried patient showing fractures wall of left maxillary sinus, floor of orbit and Anatomy model of human head.

What are the sinuses in the nose lined with?

Picture of the Sinuses. They’re lined with soft, pink tissue called mucosa. Normally, the sinuses are empty except for a thin layer of mucus. The inside of the nose has ridges called turbinates. Normally these structures help humidify and filter air. A thin wall, called the septum, divides the nose.