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  2. sinus, in anatomy, a hollow, cavity, recess, or pocket; a large channel containing blood; a suppurating tract; or a cavity within a bone.
    www.britannica.com/science/sinus

    A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it.

    en.wikipedia.org/wiki/Sinus_(anatomy)
    sinus [ si´nus] 1. a recess, cavity, or channel, such as one in bone or a dilated channel for venous blood. 2. an abnormal channel or fistula, permitting escape of pus.
    medical-dictionary.thefreedictionary.com/Sinus+(an…
    A depression or cavity formed by a bending or curving. 2. Anatomy a. A dilated channel or receptacle containing chiefly venous blood.
    www.thefreedictionary.com/sinus
    The sinuses are hollow spaces in the skull and the face bones around your nose. There are four pairs of sinuses, named for the bones that they’re located in: The maxillary sinuses are located on each side of your nose, near the cheek bones. The frontal sinuses are located above the eyes, near your forehead.
    www.healthline.com/human-body-maps/sinus-caviti…
     
  3. People also ask
    What is a sinus in anatomy?A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it. Most individuals have four paired cavities located in the cranial bone or skull.
    What is the sinus node?
    primaryExpertImage

    Dr. Ankit MAITI

    MBBS · 3 years of exp

    The sinus node or the sino-atrial node (SA node) is a specialized tissue in the right atrium of heart that generates the regular electrical impulse (rhythm) of the heart. So, it is also known as the pacemaker of the heart.
    Q&A: Sinus Node
    microsoftstart.msn.com
    What is the lining of a sinus?Consequently, their lining is mucous membrane similar to that found in the nose. The mucus secretion formed is propelled by small, hairlike processes called cilia through the ostia of the sinuses to the nasal cavity. From there it is eventually swallowed or expelled.
    Where are the sinuses located?These are named according to the bones within which the sinuses lie: surrounding the nasal cavity (maxillary sinuses), above the eyes (frontal sinuses), between the eyes (ethmoid sinuses), and behind the ethmoid bone (sphenoid sinuses). Locations of the paranasal sinuses: The paranasal sinuses are four airspaces around the nasal cavity.
    What is the function of the sinuses?The sinuses are part of your nose and respiratory system. They connect to your nasal passages in a complex network of air flow and drainage passages. As you breathe in air through your nose and mouth, it moves through the sinus passages. The sinuses also produce mucus that coats and lubricates your nasal passages and the sinuses themselves.
    What is a sinus infection?They are outgrowths from the nasal cavity. All of them drain into the superior or lateral aspect of the nose. The sinuses' lining mucosa is continuous with the nasal cavity; therefore, any infections from the nasal mucosa can easily spread to the sinuses.
     
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  5. WEBJul 24, 2023 · A sinus is defined as: A channel that is not a blood or lymphatic vessel that allows for the passage of blood or lymph, …

    • Author: Brandi Henson, Taylor M. Drake, Mary Ann Edens
    • Published: 2023/07/24
    • Publish Year: 2019
  6. WEBOct 30, 2023 · 1/4. Synonyms: Antrum of Highmore, Maxillary paranasal sinus , show more... The paranasal sinuses are paired and symmetrical, air-filled cavities situated around the nasal cavity. Paranasal sinuses

  7. WEBApr 1, 2021 · The paranasal sinuses are air-filled extensions of the nasal cavity. There are four paired sinuses – named according to the bone in which they are located – maxillary, frontal, sphenoid and ethmoid. Each …

  8. WEBFeb 11, 2023 · While seemingly simple, sinonasal anatomy is composed of intricate and subdivided air passages and drainage pathways that connect the sinuses. Go to: Structure and Function.

  9. WEBJan 30, 2023 · The paranasal sinuses (the hollow spaces in the skull and facial bones around the nose) are air-filled cavities within the frontal, ethmoidal, sphenoidal, and maxillary bones. [1] . They are …

  10. Sinus Anatomy - SinusHealth

    WEBThe nose paranasal sinuses (“the sinuses”) are air-filled cavities located within the frontal bone of the face. Each sinus is named for the bone in which it is located. Note the sinus description anatomy and the sinus …

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