#bodily_cavity__cavity__cavum  (anatomy) a natural hollow or sinus within the body
  supertype:  anatomical_structure__structure__complex_body_part__bodily_structure__body_structure  a particular complex anatomical structure; "he has good bone structure"
  part of:  body [*,49]
  subtype:  blastocoel__blastocoele__blastocele__segmentation_cavity__cleavage_cavity  the fluid-filled cavity inside a blastula
  subtype:  archenteron  central cavity of the gastrula; becomes the intestinal or digestive cavity
  subtype:  sinus__sinu  any of various air-filled cavities especially in the bones of the skull
     subtype:  ethmoid_sinus__ethmoidsinu__ethmoidal_sinus__ethmoidalsinu__sinus_ethmoidales__sinusethmoidale  a sinus of the meatuses of the nasal cavity (behind the bridge of the nose)
     subtype:  frontal_sinus__frontalsinu  one of a pair of cavities in the frontal bone
     subtype:  maxillary_sinus__maxillarysinu  one of a pair of sinuses forming a cavity in the maxilla
     subtype:  paranasal_sinus__paranasalsinu__sinus_paranasales__sinusparanasale__nasal_sinus__nasalsinu  any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with lining of the nasal cavities
  subtype:  locule__loculus__loculu  a small cavity or space within an organ or in a plant or animal
  subtype:  lumen  a cavity or passage in a tubular organ; "the lumen of the intestine"
  subtype:  socket.bodily_cavity  a bony hollow into which a structure fits
     subtype:  hip_socket__hipsocket  the socket part of the ball-and-socket joint between the head of the femur and the innominate bone
     subtype:  tooth_socket__toothsocket__alveolus  a bony socket in the alveolar ridge that holds a tooth
     subtype:  acetabulum__cotyloid_cavity  the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint
  subtype:  pulp_cavity  the central cavity of a tooth containing the pulp (including the root canal)
  subtype:  eye_socket__eyesocket__orbit__cranial_orbit__cranialorbit__orbital_cavity__orbitalcavity  the bony cavity in the skull containing the eyeball
  subtype:  buccal_cavity  the cavity between the jaws and the cheeks
  subtype:  antrum  a natural cavity or hollow in a bone
  subtype:  vestibule  any of various bodily cavities leading to another cavity (as of the ear or vagina)
     subtype:  vestibule_of_the_ear  the central cavity of the bony labyrinth of the ear
     subtype:  vestibule_of_the_vagina  the space between the labia minora containing the orifice of the urethra
  subtype:  mediastinum  the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus
  subtype:  middle_ear__tympanic_cavity__tympanum  the main cavity of the ear; between the eardrum and the inner ear
  subtype:  pleural_cavity__pleuralcavity  the cavity in the thorax that contains the lungs
  subtype:  chamber.bodily_cavity  an enclosed volume (as the aqueous chamber of the eyeball or the chambers of the heart)
     subtype:  heart_ventricle__heartventricle__ventricle  a chamber of the heart that receives blood from an atrium and pumps it to the arteries
        subtype:  left_ventricle  the chamber on the left side of the heart that receives arterial blood from the left atrium and pumps it into the aorta
        subtype:  right_ventricle  the chamber on the right side of the heart that receives venous blood from the right atrium and pumps it into the pulmonary trunk
     subtype:  atrium.chamber  any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
        subtype:  atrium_cordis__atrium_of_the_heart  the upper chamber of each half of the heart
           subtype:  right_atrium_of_the_heart__right_atrium__rightatrium__atrium_dextrum  the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus
           subtype:  left_atrium_of_the_heart__left_atrium__atrium_sinistrum  the left upper chamber of the heart that receives blood from the pulmonary veins
  subtype:  cranial_cavity__cranialcavity__intracranial_cavity__intracranialcavity  the cavity enclosed by the cranium
  subtype:  amniotic_cavity  the fluid-filled cavity that surrounds the developing embryo
  subtype:  peritoneal_cavity__greater_peritoneal_sac  the interior of the peritoneum; a potential space between layers of the peritoneum
  subtype:  bursa_omentalis__bursaomentali__omental_bursa__omentalbursa__lesser_peritoneal_cavity  an isolated part of the peritoneal cavity that is dorsal to the stomach
  subtype:  pericardial_cavity__pericardialcavity__pericardial_space__pericardialspace  the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement
  subtype:  vacuole  a tiny cavity filled with fluid in the cytoplasm of a cell
  subtype:  ventricle  one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid
     subtype:  fourth_ventricle  an irregular ventricle between the third ventricle and the central canal of the spinal cord
     subtype:  third_ventricle  a narrow ventricle in the midplane below the corpus callosum; communicates with the fourth ventricle via the Sylvian aqueduct
     subtype:  lateral_ventricle__lateralventricle  either of two horseshoe-shaped ventricles one in each cerebral hemisphere; they communicate with the third ventricle via the foramen of Monro
  subtype:  sac  a structure resembling a bag in an animal
     subtype:  yolk_sac  membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo
     subtype:  vitelline_sac__vitellinesac__yolk_sac__umbilical_vesicle__umbilicalvesicle__vesicula_umbilicus  membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional
     subtype:  amnion__amniotic_sac__amnios  thin innermost membranous sac enclosing the developing embryo in higher vertebrates (Amniota: reptiles; birds; mammals)
     subtype:  chorion  outermost membranous sac enclosing the embryo in higher vertebrates (reptiles; birds; mammals)
     subtype:  coelenteron  the saclike body cavity of a coelenterate
     subtype:  air_bladder__swim_bladder  an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
     subtype:  air_sac  any of the membranous air-filled extensions of the lungs of birds
     subtype:  air_sac.sac  any of the thin-walled extensions of the tracheae of insects
     subtype:  saccule__sacculus  a small sc or pouch (especially the smaller chamber of the membranous labyrinth)
     subtype:  vesica__bladder  a distensible membranous sac (usually containing liquid or gas)
        subtype:  urinary_bladder__urinarybladder  a membranous sac for temporary retention of urine
     subtype:  acinus  one of the small sacs or saclike dilations in a compound gland
     subtype:  bursa  a small fluid-filled sac located between movable parts of the body especially at joints
     subtype:  cisterna__cistern  a sac or cavity containing fluid especially lymph or cerebrospinal fluid
     subtype:  pouch.sac__pocket  (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
        subtype:  gizzard__ventriculus__ventriculu__gastric_mill__gastricmill  thick-walled muscular pouch below the crop in many birds and reptiles for grinding food
        subtype:  utricle__utriculus__utriculu  a small pouch into which the semicircular canals open
        subtype:  atrial_auricle__auricle__auriculaatrii  a small conical pouch projecting from the upper anterior part of each atrium of the heart
        subtype:  auricula__auricular_appendage__auricularappendage__auricular_appendix__auricularappendix  a pouch projecting from the top front of each atrium of the heart
        subtype:  cheek_pouch__cheekpouch  a membranous pouch inside the mouth of many rodents (as a gopher)
        subtype:  marsupium  an external abdominal pouch in most marsupials where newborn offspring are suckled
        subtype:  scrotum  the external pouch that contains the testes
     subtype:  vesicle__cyst  a small anatomically normal sac or bladderlike structure (especially one containing fluid)
        subtype:  lacrimal_sac__tear_sac__dacryocyst  either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands
        subtype:  Golgi_body__Golgi_apparatus__Golgi_complex__dictyosome  a net-like structure in the cytoplasm of animal cells (especially in those cells that produce secretions)
        subtype:  blister__bulla__bleb  (pathology) an elevation of the skin filled with serous fluid
           subtype:  water_blister__waterblister  blister containing a nonpurulent clear watery content
           subtype:  blood_blister__bloodblister  blister containing blood or bloody serum usually caused by an injury
        subtype:  follicle  any small spherical group of cells containing a cavity
           subtype:  hair_follicle  a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with hair follicles
           subtype:  Graafian_follicle  a vascular body in a mammalian ovary enclosing a developing egg
        subtype:  seminal_vesicle__seminalvesicle  adds nutrient fluid to semen during ejaculation
     subtype:  alveolus__air_sac__air_cell__aircell  a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
     subtype:  pericardial_sac__pericardialsac  the membrane surrounding the heart
  subtype:  uterine_cavity__uterinecavity  the space inside the uterus between the cervical canal and the Fallopian tubes
  subtype:  nasal_cavity__nasalcavity  either of the two cavities lying between the floor of the cranium and the roof of the mouth and extending from the face to the pharynx
  subtype:  nasopharynx  cavity forming the upper part of the pharynx
  subtype:  oropharynx  cavity formed by the pharynx at the back of the mouth
  subtype:  laryngopharynx  the lower part of the pharynx
  subtype:  cecum__caecum__blind_gut  the cavity in which the large intestine begins and into which the ileum opens; "the appendix is an offshoot of the cecum"
  subtype:  tubular_cavity__tubularcavity  a cavity having the shape of a tube
     subtype:  pharynx__throat  the passage to the stomach and lungs; in the front part of the neck below the chin and above the collarbone
  subtype:  armpit__axilla__axillary_cavity__axillary_fossa  small depression under the shoulder joint where the arm joins the shoulder
  subtype:  chest_cavity__chestcavity__thoraciccavity  the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart
  subtype:  abdominal_cavity__abdominalcavity  the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm
  subtype:  renal_pelvis__pelvis  a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter
  subtype:  pelvic_cavity  the space bounded by the bones of the pelvis and containing the pelvic viscera
  subtype:  celom__coelom__celoma  a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity
  subtype:  fossa__pit  a concavity in a surface (especially an anatomical depression)
     subtype:  glenoid_cavity__glenoidcavity__glenoid_fossa__glenoidfossa  the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint
     subtype:  glenoid_fossa__glenoidfossa__mandibular_fossa  a deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible
     subtype:  pit_of_the_stomach__epigastric_fossa  a slight depression in the midline just below the sternum (where a blow can affect the solar plexus)

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