sinus

(redirected from Sinuses)
Also found in: Dictionary, Thesaurus, Medical.
Related to Sinuses: Paranasal sinuses

sinus,

cavity or hollow space in the body, usually filled with air or blood. In humans the paranasal sinuses, mucus-lined cavities in the bones of the face, are connected by passageways to the nose and probably help to warm and moisten inhaled air. When drainage from them is blocked, as after a cold, these sinuses often become infected, a condition called sinusitis. The accumulation of pus results in pressure, headaches, pain, and general discomfort. In invertebrates one of the spaces among the muscles and viscera through which blood returns to the heart is also known as a sinus.

sinus

(sÿ -nŭs) A semienclosed break along the borders of a lunar mare or in a scarp. The word is used in the approved name of such a feature on the Moon. (Latin: bay)

Sinus

 

in anatomy, a cavity, protrusion, or long closed channel. In vertebrates (including man), the term “sinus” refers to a channel filled with venous blood in the dura mater. The cavity in some cranial bones is also called a sinus. [23–1297–]

sinus

[′sī·nəs]
(biology)
A cavity, recess, or depression in an organ, tissue, or other part of an animal body.

sinus

1. Anatomy
a. any bodily cavity or hollow space
b. a large channel for venous blood, esp between the brain and the skull
c. any of the air cavities in the cranial bones
2. Pathol a passage leading to a cavity containing pus
3. Botany a small rounded notch between two lobes of a leaf, petal, etc.
4. an irregularly shaped cavity
References in periodicals archive ?
When the sinuses are working properly, mucus will drain into the nasal passages or out the back of the throat.
Since the maxillary alveolar process forms the maxillary sinus floor, assessment of possible alterations in maxillary sinuses is essential especially in the preoperative implant planning in the maxillary posterior region (6).
The absence of hyphae with the mucosa, bone and blood vessels characterizes noninvasive fungal sinusitis, while invasive fungal sinusitis is defined by the presence of hyphae within the mucosal and submucosal tissues, bone and blood vessels of the paranasal sinuses.
Discuss the anatomy of the paranasal sinuses and to identify the common anatomical variations encountered during routine reporting of CT scans of paranasal sinuses.
The proportion of mucoceles located in the maxillary and ethmoid sinuses were both 30.
Several studies have suggested that the frontal sinuses are slightly bigger in males than in females, and the presence of a metopic suture is associated with the absence of the frontal sinuses (BROWN et al.
Your sinuses comprise four pairs of hollow spaces in your face that surround your nose.
Goldenseal, (Hydrastis Canadensis) is believed to help reduce inflammation of the mucous membranes, such as those lining the throat, sinuses, and lungs enabling the tissues to resume their protective role.
The shape of their skulls, characterized by a relatively smaller facial area as compared to the cranium, results in poorer drainage of fluid from the middle ear and sinuses, via the eustachian tubes, eventually into the throat.
When people say, "I'm having a sinus attack," they usually are referring to symptoms in one or more of four pairs of cavities, or sinuses, known as paranasal sinuses.
The InstaTrak computer provides the surgeon with an unprecedented, personalized road map to a patient's sinuses and real-time tracking of the surgical tool - vital information considering the honeycomb of sinuses in the skull are separated by mere fractions of an inch from the eyes and brain.
The main purpose of the sinuses is to lighten the weight of the bones in your skull.