- Types:
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birth canal
a passage in the uterus and vagina through which a fetus passes during vaginal birth
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meatus
a natural body passageway
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opening, orifice, porta
an aperture or hole that opens into a bodily cavity
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canal, channel, duct, epithelial duct
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
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sinusoid
tiny endothelium-lined passages for blood in the tissue of an organ
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carpal tunnel
a passageway in the wrist through which nerves and the flexor muscles of the hands pass
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root canal
the passage in the root of a tooth through which its nerve and blood vessels enter the pulp cavity
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esophagus, gorge, gullet, oesophagus
the passage between the pharynx and the stomach
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epicardia
the short part of the esophagus extending downward from the diaphragm to the stomach
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fauces
the passage between the back of the mouth and the pharynx
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fistula, sinus
an abnormal passage leading from a suppurating cavity to the body surface
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shunt
a passage by which a bodily fluid (especially blood) is diverted from one channel to another
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vent
external opening of urinary or genital system of a lower vertebrate
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blastopore
the opening into the archenteron
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pore
any small opening in the skin or outer surface of an animal
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aortic orifice
the orifice from the lower left chamber of the heart to the aorta
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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)
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acoustic meatus, auditory canal, auditory meatus, ear canal, external auditory canal
either of the passages in the outer ear from the auricle to the tympanic membrane
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nasal meatus
the passages in the nasal cavity formed by the projections of the nasal conchae
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canalis vertebralis, spinal canal, vertebral canal
the canal in successive vertebrae through which the spinal cord passes
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porta hepatis
opening for major blood vessels to enter and leave the liver
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spiracle
a breathing orifice
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ductule, ductulus
a very small duct
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canaliculus
a small canal or duct as in some bones and parts of plants
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Schlemm's canal, canal of Schlemm, sinus venosus sclerae
a circular canal in the eye that drains aqueous humor from the anterior chamber of the eye into the anterior ciliary veins
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sinus, venous sinus
a wide channel containing blood; does not have the coating of an ordinary blood vessel
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mouth
the externally visible part of the oral cavity on the face and the system of organs surrounding the opening
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os
a mouth or mouthlike opening
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cervix, cervix uteri, uterine cervix
necklike opening to the uterus
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fenestra
a small opening covered with membrane (especially one in the bone between the middle and inner ear)
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lachrymal duct, lacrimal duct, tear duct
any of several small ducts that carry tears from the lacrimal glands
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nasolacrimal duct
a duct that carries tears from the lacrimal sac to the nasal cavity
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Haversian canal
any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone
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hepatic duct
the duct that drains bile from the liver
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canalis inguinalis, inguinal canal
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
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bile duct, common bile duct
a duct formed by the hepatic and cystic ducts; opens into the duodenum
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pancreatic duct
a duct connecting the pancreas with the intestine
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cardia
the opening into the stomach and that part of the stomach connected to the esophagus
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lymph vessel, lymphatic vessel
a vascular duct that carries lymph which is eventually added to the venous blood circulation
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salivary duct
a duct through which saliva passes from the salivary gland into the mouth
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Sylvian aqueduct, aqueductus cerebri, cerebral aqueduct
a canal connecting the third and fourth ventricles
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introitus
entrance or opening to a hollow organ or tube (especially the vaginal opening)
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external orifice, urethral orifice
the orifice through which urine is discharged
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ureter
either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder
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urethra
duct through which urine is discharged in most mammals and which serves as the male genital duct
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canalis cervicis uteri, cervical canal
a spindle-shaped canal extending from the uterus to the vagina
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umbilical, umbilical cord
membranous duct connecting the fetus with the placenta
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vagina
the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus
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epididymis
a convoluted tubule in each testis; carries sperm to vas deferens
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ductus deferens, vas deferens
a duct that carries spermatozoa from the epididymis to the ejaculatory duct
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seminal duct
the efferent duct of the testis in man
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ejaculatory duct
a part of the seminal duct formed by the duct from the seminal vesicle and the vas deferens; passes through the prostate gland
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cartilaginous tube
a duct with cartilaginous walls
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bronchiole
any of the smallest bronchial ducts; ending in alveoli
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GI tract, alimentary canal, alimentary tract, digestive tract, digestive tube, gastrointestinal tract
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
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pylorus
a small circular opening between the stomach and the duodenum
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anus
the excretory opening at the end of the alimentary canal
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fontanel, fontanelle, soft spot
any membranous gap between the bones of the cranium in an infant or fetus
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bypass
a surgically created shunt (usually around a damaged part)
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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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lactiferous duct
ducts of the mammary gland that carry milk to the nipple
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naris
any of the openings to the nasal cavities that allow air to flow through the cavities to the pharynx
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rima
a narrow elongated opening or fissure between two symmetrical parts