| 释义 |
tympanic cavity
tympanic cavityn. A large, irregularly shaped cavity of the middle ear.Thesaurus| Noun | 1. |  tympanic cavity - the main cavity of the ear; between the eardrum and the inner earmiddle ear, tympanumbonelet, ossicle, ossiculum - a small bone; especially one in the middle earauditory apparatus - all of the components of the organ of hearing including the outer and middle and inner earsbodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the bodyauditory tube, Eustachian tube - either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrummalleus, hammer - the ossicle attached to the eardrumincus, anvil - the ossicle between the malleus and the stapesstapes, stirrup - the stirrup-shaped ossicle that transmits sound from the incus to the cochlea |
Tympanic Cavity
tympanic cavity[tim′pan·ik ′kav·əd·ē] (anatomy) The irregular, air-containing, mucous-membrane-lined space of the middle ear; contains the three auditory ossicles and communicates with the nasopharynx through the auditory tube. Tympanic Cavity a cavity in the middle ear of terrestrial animals and man. It develops from the cavity of the first gill slit. It has become lost in caudate and legless amphibians and burrowing snakes. The tympanic cavity is located between the tympanic membrane, the bony labyrinth of the inner ear, and one or more cranial bones; it contains the auditory ossicles. The tympanic cavity is filled with air and communicates with the pharyngeal cavity via the auditory or Eustachian tube. In some terrestrial vertebrates, especially mammals, the tympanic cavity enlarges and its functions intensify because of the formation of eardrums and additional auditory cavities in the adjacent parts of the cranium. The development of cancellous bone in these parts helps to make “spatial hearing” more acute, especially in aquatic and subterranean animals. The connection of the tympanic cavity to resonance chambers attuned to the sound frequencies most important in the life of animals increases the selective sensitivity of the organ of hearing. G. N. SIMKIN tympanic cavity
cavity [kav´ĭ-te] 1. a hollow or space, or a potential space, within the body or one of its organs; called also caverna and cavum.2. the lesion produced by dental caries. Cavities in the body. From Applegate, 2000.abdominal cavity the cavity of the body between the diaphragm above and the pelvis below, containing the abdominal organs.absorption c's cavities in developing compact bone due to osteoclastic erosion, usually occurring in the areas laid down first.amniotic cavity the closed sac between the embryo and the amnion, containing the amniotic fluid.cranial cavity the space enclosed by the bones of the cranium.glenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus.marrow cavity (medullary cavity) the cavity that contains marrow" >bone marrow in the diaphysis of a long bone; called also medullary canal.nasal cavity the proximal portion of the passages of the respiratory system, extending from the nares to the pharynx; it is divided into left and right halves by the nasal septum and is separated from the oral cavity by the hard palate.oral cavity the cavity of the mouth, bounded by the jaw bones and associated structures (muscles and mucosa).pelvic cavity the space within the walls of the pelvis.pericardial cavity the potential space between the epicardium and the parietal layer of the serous pericardium.peritoneal cavity the potential space between the parietal and the visceral peritoneum.pleural cavity the potential space between the two layers of pleura.pulp cavity the pulp-filled central chamber in the crown of a tooth.cavity of septum pellucidum the median cleft between the two laminae of the septum pellucidum. Called also pseudocele, pseudocoele, and fifth ventricle.serous cavity a coelomic cavity, like that enclosed by the pericardium, peritoneum, or pleura, not communicating with the outside of the body and lined with a serous membrane, i.e., one which secretes a serous fluid.tension cavity cavities of the lung in which the air pressure is greater than that of the atmosphere.thoracic cavity the portion of the ventral body cavity situated between the neck and the diaphragm; it contains the pleural cavity.tympanic cavity the major portion of the middle ear, consisting of a narrow air-filled cavity in the temporal bone that contains the auditory ossicles and communicates with the mastoid air cells and the mastoid antrum by means of the aditus and the nasopharynx by means of the auditory tube. The middle ear and the tympanic cavity were formerly regarded as being synonymous.uterine cavity the flattened space within the uterus communicating proximally on either side with the fallopian tubes and below with the vagina.tym·pan·ic cav·i·ty [TA] an air chamber in the temporal bone, medial to the tympanic membrane, between the external acoustic meatus and the inner ear containing the ossicles; it is lined with mucous membrane continuous with the pharyngotympanic tube anteriorly and the tympanic antrum and mastoid air cells posteriorly and bound by the tympanic membrane laterally. Synonym(s): cavitas tympani [TA], cavity of middle ear, cavum tympanitympanic cavityn. A large, irregularly shaped cavity of the middle ear.tym·pan·ic cav·i·ty (tim-pan'ik kav'i-tē) [TA] An air chamber in the temporal bone containing the ossicles; it is lined with mucous membrane and is continuous with the auditory tube anteriorly and the tympanic antrum and mastoid air cells posteriorly. cavity (kav'it-e) [L. cavitas, hollow] A hollow space, such as a body organ or the hole in a tooth produced by caries.abdominal cavityThe ventral cavity between the diaphragm and pelvis, containing the abdominal organs. It is lined with a serous membrane, the peritoneum, and contains the following organs: stomach with the lower portion of the esophagus, small and large intestines (except sigmoid colon and rectum), liver, gallbladder, spleen, pancreas, adrenal glands, kidneys, and ureters. It is continuous with the pelvic cavity; the two constitute the abdominopelvic cavity. See: abdomen; abdominal quadrants for illus. alveolar cavityA tooth socket.articular cavityThe synovial cavity of a joint. CAVITIES OF THE BODYbody cavityCAVITIES OF THE BODY1. Any hollow space within the body. See: illustration2. A hidden body space that is accessible from the outside, e.g., rectum or vagina. Referred to in “body cavity search for contraband”. 3. Derivatives of the coelom, i.e., the pericardial, peritoneal, and plural sacs. See: coelombuccal cavityOral cavity.cotyloid cavityAcetabulum.cranial cavityThe cavity of the skull, which contains the brain. dental cavityCaries.dorsal cavityThe body cavity composed of the cranial and spinal cavities. See: body cavity for illus. glenoid cavityGlenoid fossa (2).joint cavityThe articular cavity or space enclosed by the synovial membrane and articular cartilages. It contains synovial fluid. Synonym: joint spacelaryngeal cavityThe hollow inside the larynx from its inlet at the laryngopharynx to the beginning of the trachea. It has three segments (from top to bottom): vestibule of the larynx, ventricle of the larynx, infraglottic cavity. lesser peritoneal cavityOmental bursa.medullary cavityThe marrow-filled space in a bone. nasal cavityOne of two cavities between the floor of the cranium and the roof of the mouth, opening to the nose anteriorly and the nasopharynx posteriorly. Its lining of ciliated epithelium warms and moistens inhaled air, and traps dust and pathogens on mucus that are then swept toward the pharynx. The nasal septum (ethmoid and vomer) separates the nasal cavities, and the olfactory receptors are in the upper part of each cavity. The paranasal sinuses (frontal, maxillary, sphenoidal, and ethmoidal) open into the meatus below the conchae. The orifices of the frontal, anterior ethmoidal, and maxillary sinuses are in the middle meatus. The orifices of the posterior ethmoidal and sphenoidal sinuses are in the superior meatus. The nasal mucosa is highly vascular; blood is supplied by the maxillary arteries from the external carotid arteries and by the ethmoidal arteries from the internal carotid arteries. oral cavityThe space inside the teeth and gums that is filled by the tongue when the mouth is closed and relaxed. Synonym: buccal cavitypelvic cavityThe bony hollow formed by the innominate bones, the sacrum, and the coccyx. The major pelvic cavity lies between the iliac fossae and above the iliopectineal lines. The minor pelvic cavity lies below the iliopectineal lines. See: pelvispericardial cavityThe potential space between the epicardium (visceral pericardium) and the parietal pericardium. See: pericardia friction rub; pericarditisperitoneal cavityThe potential space between the parietal peritoneum, which lines the abdominal wall, and the visceral peritoneum, which forms the surface layer of the visceral organs. It contains serous fluid. pleural cavityThe potential space between the parietal pleura that lines the thoracic cavity and the visceral pleura that covers the lungs. It contains serous fluid that prevents friction. pleuroperitoneal cavityThe ventral body cavity. See: body cavity for illus.; coelompulp cavityThe cavity in a tooth containing blood vessels and nerve endings.resonating cavitiesThe anatomic intensifiers of the human voice, including the upper portion of the larynx, pharynx, nasal cavity, paranasal sinuses, and oral cavity.Rosenmüller cavity See: Rosenmüller, Johann Christianserous cavityThe space between two layers of serous membrane (e.g., the pleural, pericardial, and peritoneal cavities). spinal cavityThe cavity that contains the spinal cord. See: body cavity for illus. splanchnic cavityAny of the cavities of the body, such as the cranial, thoracic, and abdominal cavities, that contain important organs.  THORACIC CAVITYthoracic cavityThe part of the ventral cavity above the diaphragm, the domed muscle that separates it from the abdominal cavity; it is enclosed by the chest wall. The thoracic viscera include the pleural membranes that surround the lungs, the mediastinum between the lungs, which contains the heart and pericardial membranes, the thoracic aorta, pulmonary artery and veins, vena cavae, thymus gland, lymph nodes, trachea, bronchi, esophagus, and thoracic duct. See: illustrationtympanic cavityMiddle ear.uterine cavityThe hollow space inside the body of the uterus. ventral cavityThe body cavity composed of the thoracic, abdominal, and pelvic cavities. See: body cavity for illus. visceral cavityThe body cavity containing the viscera (i.e., the thorax, abdomen, and pelvis).tym·pan·ic cav·i·ty (tim-pan'ik kav'i-tē) [TA] An air chamber in the temporal bone, medial to the tympanic membrane, between the external acoustic meatus and the inner ear containing the ossicles.
Synonym(s): cavity of middle ear. tympanic cavity
Related to tympanic cavity: tympanic membrane, round window, Eustachian tubeSynonyms for tympanic cavitynoun the main cavity of the earSynonymsRelated Words- bonelet
- ossicle
- ossiculum
- auditory apparatus
- bodily cavity
- cavum
- cavity
- auditory tube
- Eustachian tube
- malleus
- hammer
- incus
- anvil
- stapes
- stirrup
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