types:
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pore
any small opening in the skin or outer surface of an animal
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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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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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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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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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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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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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lactiferous duct
ducts of the mammary gland that carry milk to the nipple
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cavernous sinus, sinus cavernosus
either of a pair of large venous sinuses in the cranial cavity
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coronary sinus, sinus coronarius
a short sinus receiving most of the veins of the heart; empties into the right atrium
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sigmoid sinus, sinus sigmoideus
an S-shaped dural sinus on the temporal and occipital bones
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sinus rectus, straight sinus, tentorial sinus
an unpaired sinus of the dura mater
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sinus transversus, transverse sinus
a paired dural sinus; terminates in the sigmoid sinus
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sweat duct
a small duct that conveys sweat from a sudoriferous gland to the surface of the skin
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biliary ductule
excretory ducts of the liver; empty into the hepatic ducts
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thoracic duct
the major duct of the lymphatic system
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lacteal
any of the lymphatic vessels that convey chyle from the small intestine to the thoracic duct
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bronchial tube, bronchus
either of the two main branches of the trachea
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trachea, windpipe
membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
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enteron
the alimentary canal (especially of an embryo or a coelenterate)
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ostiole
a small pore especially one in the reproductive bodies of certain algae and fungi through which spores pass