#passage.anatomical_structure__passageway  a path or channel or duct through or along which something may pass; "the nasal passages"
  supertype:  anatomical_structure__structure__complex_body_part__bodily_structure__body_structure  a particular complex anatomical structure; "he has good bone structure"
  subtype:  birth_canal__birthcanal  a passage in the uterus and vagina through which a fetus passes during vaginal birth
  subtype:  meatus  a natural body passageway
     subtype:  auditory_meatus__acoustic_meatus__ear_canal__earcanal__auditory_canal__external_auditory_canal  either of the passages in the outer ear from the auricle to the tympanic membrane
     subtype:  nasal_meatus  the passages in the nasal cavity formed by the projections of the nasal conchae
  subtype:  orifice__opening__porta  an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
     subtype:  vent  external opening of urinary or genital system of a lower vertebrate
     subtype:  blastopore  the opening into the archenteron
     subtype:  aortic_orifice  the orifice from the lower left chamber of the heart to the aorta
     subtype:  stoma  a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
     subtype:  porta_hepatis__portahepati  opening for major blood vessels to enter and leave the liver
     subtype:  spiracle  a breathing orifice
        subtype:  blowhole  the spiracle of a cetacean located far back on the skull
        subtype:  stigma.spiracle  an external tracheal aperture in a terrestrial arthropod
     subtype:  mouth  the externally visible part of the oral cavity on the face and the system of organs surrounding the opening; "she wiped lipstick from her mouth"
        subtype:  cytostome  mouth of a protozoan
        subtype:  neb__beak__bill__nib__pecker  horny projecting mouth of a bird
        subtype:  beak  beaklike mouth of animals other than birds (e.g., turtles)
     subtype:  os  a mouth or mouthlike opening
     subtype:  uterine_cervix__uterinecervix__cervix__cervix_uteri  necklike opening to the uterus
        subtype:  incompetent_cervix__incompetentcervix  (obstetrics) uterine cervix that becomes dilated before term and without labor often resulting in miscarriage or premature birth
     subtype:  fenestra  a small membrane-covered opening (especially one in the bone between the middle and inner ear)
        subtype:  fenestra_ovalis__fenestra_vestibuli__oval_window__fenestra_of_the_vestibule  fenestra that has the base of the stapes attached to it
        subtype:  fenestra_rotunda__fenestra_cochleae__round_window__roundwindow__fenestra_of_the_cochlea  fenestra leading into the cochlea
     subtype:  cardia  the opening into the stomach and that part of the stomach connected to the esophagus
     subtype:  introitus__introitu  entrance or opening to a hollow organ or tube (especially the vaginal opening); "the introitus of the vagina"
     subtype:  urethral_orifice__external_orifice  the orifice through which urine is discharged
     subtype:  pylorus__pyloru  a small circular opening between the stomach and the duodenum
     subtype:  anus__arse__arsehole__asshole  excretory opening at the end of the alimentary canal
        subtype:  imperforate_anus  a congenital defect of the anus; there is partial or complete obstruction of the anal opening
     subtype:  fontanelle__fontanel__soft_spot  any membranous gap between the bones of the cranium in an infant or fetus
        subtype:  anterior_fontanelle  corresponds to the bregma when bones have ossified
        subtype:  sphenoid_fontanelle__sphenoid_fontanel__sphenoidal_fontanelle__sphenoidal_fontanel  the irregularly shaped area on either side of the cranium where the frontal bone and the anterior tip of the parietal bone and the temporal bone and the greater wing of the sphenoid bone meet; corresponds to the pterion when bones have ossified
     subtype:  naris__nari  any of the openings to the nasal cavities that allow air to flow through the cavities to the pharynx
        subtype:  nostril__anterior_naris  either one of the two external openings to the nasal cavity in the nose
        subtype:  posterior_naris__posteriornari  either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx
     subtype:  rima  a narrow elongated opening or fissure between two symmetrical parts
        subtype:  oral_cavity__mouth__oral_fissure__rima_oris  the opening through which food is taken in and vocalizations emerge; "he stuffed his mouth with candy"
           subtype:  maw__trap__hole__yap__gob  informal terms for the mouth
        subtype:  pudendal_cleft__urogenital_cleft__rima_pudendi__rima_vulvae__pudendal_cleavage__pudendal_slit__vulvar_slit  the fissure between the labia majora
        subtype:  rima_glottidis__rima_vocalis__true_glottis__glottis_vera__glottisvera  the space between the two true vocal folds
        subtype:  rima_vestibuli__rima_respiratoria__false_glottis__falseglotti__glottis_spuria__glottisspuria  the opening between the false vocal folds
  subtype:  duct__canal__channel  a bodily passage or tube conveying a secretion or other substance
     subtype:  pore.duct  any small opening in the skin or outer surface of an animal
        subtype:  ostiole  a small pore especially one in the reproductive bodies of certain algae and fungi through which spores pass
     subtype:  spinal_canal__vertebral_canal__vertebralcanal__canalis_vertebralis__canalisvertebrali  the canal in successive vertebrae through which the spinal cord passes
     subtype:  ductule__ductulus  a very small duct
        subtype:  sweat_duct__sweatduct  a small duct that conveys sweat from a sudoriferous gland to the surface of the skin
        subtype:  biliary_ductule  excretory ducts of the liver; empty into the hepatic ducts
     subtype:  canaliculus__canaliculu  a small canal or duct as in some bones and parts of plants
     subtype:  canal_of_Schlemm__Schlemm's_canal__schlemm'scanal__sinus_venosus_sclerae__sinusvenosussclerae  a circular canal in the eye that drains aqueous humor from the anterior chamber of the eye into the anterior ciliary veins
     subtype:  venous_sinus__sinus__sinu  a wide channel containing blood; does not have the coating of an ordinary blood vessel
        subtype:  cavernous_sinus__sinus_cavernosus  either of a pair of large venous sinuses in the cranial cavity
        subtype:  coronary_sinus__sinus_coronarius  a short sinus receiving most of the veins of the heart; empties into the right atrium
        subtype:  sigmoid_sinus__sigmoidsinu__sinus_sigmoideus  an S-shaped dural sinus on the temporal and occipital bones
        subtype:  straight_sinus__tentorial_sinus__tentorialsinu__sinus_rectus  an unpaired sinus of the dura mater
        subtype:  transverse_sinus__sinus_transversus__sinustransversu  a paired dural sinus; terminates in the sigmoid sinus
     subtype:  lacrimal_duct__lachrymal_duct__lachrymalduct__tear_duct  any of several small ducts that carry tears from the lacrimal glands
     subtype:  nasolacrimal_duct  a duct that carries tears from the lacrimal sac to the nasal cavity
     subtype:  Haversian_canal  any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone
     subtype:  hepatic_duct__hepaticduct  the duct that drains bile from the liver
     subtype:  inguinal_canal__canalis_inguinalis  oblique passage through the lower abdominal wall; in males it is the passage through which the testes descend into the scrotum and it contains the spermatic cord; in females it transmits the round ligament of the uterus
     subtype:  common_bile_duct__bile_duct  a duct formed by the hepatic and cystic ducts; opens into the duodenum
     subtype:  pancreatic_duct  a duct connecting the pancreas with the intestine
     subtype:  lymph_vessel__lymphvessel__lymphatic_vessel__lymphaticvessel  a vascular duct that carries lymph which is eventually added to the venous blood circulation
        subtype:  thoracic_duct  the major duct of the lymphatic system
        subtype:  lacteal  any of the lymphatic vessels that convey chyle from the small intestine to the thoracic duct
     subtype:  salivary_duct  a duct through which saliva passes from the salivary gland into the mouth
     subtype:  cerebral_aqueduct__Sylvian_aqueduct__aqueductus_cerebri  a canal connecting the third and fourth ventricles
     subtype:  ureter  either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder
     subtype:  urethra  duct through which urine is discharged in most mammals and which serves as the male genital duct
     subtype:  cervical_canal__canalis_cervicis_uteri  a spindle-shaped canal extending from the uterus to the vagina
     subtype:  umbilical_cord__umbilicalcord  membranous duct connecting the fetus with the placenta
     subtype:  vagina  the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus; "the vagina receives the penis during coitus"; "the vagina is elastic enough to allow the passage of a fetus"
     subtype:  epididymis  a convoluted tubule in each testis; carries sperm to vas deferens
     subtype:  vas_deferens__ductus_deferens  a duct that carries spermatozoa from the epididymis to the ejaculatory duct
     subtype:  seminal_duct__seminalduct  the efferent duct of the testis in man
     subtype:  ejaculatory_duct__ejaculatoryduct  a part of the seminal duct formed by the duct from the seminal vesicle and the vas deferens; passes through the prostate gland
     subtype:  alimentary_canal__alimentary_tract__digestive_tube__digestivetube__digestivetract__gastrointestinal_tract__GI_tract  tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
        subtype:  enteron  the alimentary canal (especially of an embryo or a coelenterate)
     subtype:  lactiferous_duct__lactiferousduct  ducts of the mammary gland that carry milk to the nipple
  subtype:  sinusoid  tiny endothelium-lined passages for blood in the tissue of an organ
  subtype:  root_canal  the passage in the root of a tooth through which its nerve and blood vessels enter the pulp cavity
  subtype:  esophagus__esophagu__oesophagus__gorge__gullet  the passage between the pharynx and the stomach
  subtype:  epicardia  the short part of the esophagus extending downward from the diaphragm to the stomach
  subtype:  fauces  the passage between the back of the mouth and the pharynx
  subtype:  fistula__sinus__sinu  an abnormal passage leading from a suppurating cavity to the body surface
  subtype:  shunt  a passage by which a bodily fluid (especially blood) is diverted from one channel to another; "an arteriovenus shunt"
     subtype:  bypass  a surgically created shunt (usually around a damaged part)
     subtype:  portacaval_shunt  shunt that is created surgically between the portal vein and the inferior vena cava so that blood from the abdominal organs can bypass the liver

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