types:
birth canal
a passage in the uterus and vagina through which a fetus passes during vaginal birth
meatus
a natural body passageway
sinusoid
tiny endothelium-lined passages for blood in the tissue of an organ
carpal tunnel
a passageway in the wrist through which nerves and the flexor muscles of the hands pass
root canal
the passage in the root of a tooth through which its nerve and blood vessels enter the pulp cavity
epicardia
the short part of the esophagus extending downward from the diaphragm to the stomach
fauces
the passage between the back of the mouth and the pharynx
fistula,
sinus
an abnormal passage leading from a suppurating cavity to the body surface
shunt
a passage by which a bodily fluid (especially blood) is diverted from one channel to another
vent
external opening of urinary or genital system of a lower vertebrate
pore
any small opening in the skin or outer surface of an animal
aortic orifice
the orifice from the lower left chamber of the heart to the aorta
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)
nasal meatus
the passages in the nasal cavity formed by the projections of the nasal conchae
porta hepatis
opening for major blood vessels to enter and leave the liver
canaliculus
a small canal or duct as in some bones and parts of plants
sinus,
venous sinus
a wide channel containing blood; does not have the coating of an ordinary blood vessel
mouth
the externally visible part of the oral cavity on the face and the system of organs surrounding the opening
os
a mouth or mouthlike opening
fenestra
a small opening covered with membrane (especially one in the bone between the middle and inner ear)
nasolacrimal duct
a duct that carries tears from the lacrimal sac to the nasal cavity
Haversian canal
any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone
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
cardia
the opening into the stomach and that part of the stomach connected to the esophagus
salivary duct
a duct through which saliva passes from the salivary gland into the mouth
introitus
entrance or opening to a hollow organ or tube (especially the vaginal opening)
ureter
either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder
urethra
duct through which urine is discharged in most mammals and which serves as the male genital duct
vagina
the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus
epididymis
a convoluted tubule in each testis; carries sperm to vas deferens
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
bronchiole
any of the smallest bronchial ducts; ending in alveoli
pylorus
a small circular opening between the stomach and the duodenum
anus
the excretory opening at the end of the alimentary canal
bypass
a surgically created shunt (usually around a damaged part)
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
naris
any of the openings to the nasal cavities that allow air to flow through the cavities to the pharynx
rima
a narrow elongated opening or fissure between two symmetrical parts