A dilated vessel or canal.
A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.
a cavity within bone or a channel that contains blood; also refers to an abnormal tract in the body
Latin = a hollow or space which may contain air, venous or arterial blood, lymph or serous fluid; adjective, sinusoid.
Abnormal opening. Elongated tract leading from pus-filled region of the body to the exterior or to the cavity of a hallow organ.
hollow in a bone (paranasal sinus) or other tissue; a channel for blood (vascular sinus); any cavity having a narrow opening
An opening or space in a tissue. Infectious processes often produce a nonhealing sinus which may connect between tissues or even to the outside.
(sigh´ nus) [L. sinus: a bend, hollow] • A cavity in a bone, a tissue space, or an enlargement in a blood vessel.
Cavity of the anterior margin, usually produced by an anteriorly directed ramus.
A cavity in a bone or other tissue. Commonly used to describe the cavities in the skull that open into the nasal cavity.
A cavity found within the bones of the skull. The cavities are interconnected to the nasal passages and are lined with a mucus membrane and are subjected to blockage resulting in a squeeze when a diver descends. Spotter: For safety reasons, free-divers never train alone. Their buddy is referred to as a spotter and will step in to assist if there is any sign of a problem. The spotter is trained in the necessary first-aid techniques.
an abnormal passage leading from a suppurating cavity to the body surface
any of various air-filled cavities especially in the bones of the skull
a cavity/passageway that links the abscess with your outer skin
an air-filled cavity, lined with an almost invisible mucous membrane and very fine blood vessels
an air-filled space in the diploe of a skull bone
a small cavity in the bones of the face with a hole that drains away fluid into the nose and down the throat
(L. sinus, cavity, channel, hollow) A cavity in a bone, e.g., frontal sinus.
air spaces above the upper teeth
(SI-nuhs) A space within a bone lined with mucous membrane, such as the frontal and maxillary sinuses in the head. Also, a modified vein with an enlarged lumen for blood storage.
A hollow or cavity. Can also refer to a large chanel, as in a blood sinus.
a hollow cavity. See also paranasal sinuses.
a cavity into which blood flows and baths the internal organs in organisms with an open circulatory system.
(Also called paranasal sinuses.) air cavities within the facial bones, lined by mucous membranes similar to those in other parts of the airways. .
Hollow cavity in the jawbone.
a recess, a cavity or hollow space, a dilated channel for venous blood or a small tunnel
An air-filled cavity in a dense portion of a skull bone. The sinuses decrease the weight of the skull. The sinuses are formed in four right-left pairs. The frontal sinuses are positioned behind the forehead, while the maxillary sinuses are behind the cheeks. The sphenoid and ethmoid sinuses are deeper in the skull behind the eyes and maxillary sinuses. The sinuses are lined by mucous-secreting cells. Air enters the sinuses through small opening in bone called ostia. If an ostium is blocked, air cannot pass into the sinus and likewise mucous cannot drain out. See also: Sinusitis . See the entire definition of Sinus
The sinuses (paranasal sinuses) are air cavities within the facial bones. They are lined by mucous membranes similar to those in other parts of the airways.
a hollow or channel in certain bones.
a hollow area in the bone
Can be anatomical or normal such as nasal sinus
Any bodily cavity or hollow space. In the context of this web site, the term refers to the nasal sinus.
1 - Hollow space (normally) filled with air, as in the paranasal sinuses 2 - Relating to sino-atrial node in the heart, a structure important for the heart rhythm. 3 - Any channel or cavity filled with venous blood or lymph
A notch, depression or hollow cavity on the surface of an organ. More commonly associated with cavities in proximity of the nose.
A chamber or hollow in a tissue; a large, dilated vein.
little air cavities in skull with communication into nasal cavity throughout a little hole.See figures 1 and 2.
The air spaces in the skull.
Hollow, air-filled spaces located within the bones of the face surrounding the nasal cavity. There are four pairs of cavities, called paranasal sinuses, each of which is connected to the nose by small openings.
