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An infundibulum (Latin for funnel; plural, infundibula) is a funnel-shaped cavity or organ.


  • Brain: Infundibulum and infundibular stalk are alternative names for the pituitary stalk, the connection between the hypothalamus and the pars nervosa hypophyseos (the posterior lobe of the pituitary gland). It is situated posterior to the optic chiasma.
  • Hair: An infundibulum is the cup or funnel in which a hair follicle grows.
  • Heart: The infundibulum of the heart, or conus arteriosus, is the outflow portion of the right ventricle.
  • Kidney: In the collecting system of the kidney, urine flows from the calyces (the minor calyx and the major calyx), through the infundibula into the renal pelves.
  • Lungs: The alveolar sacs of the lungs, from which the air chambers (alveoli) open, are also called infundibula.
  • Avian lungs: the tubular extension from the atrium which continues to form air capillaries is called infundibulum.
  • Carcinoma: The structure providing vascular flow to watts and associated structures. Also referred to as an infundibular stalk or umbilicus.
  • Nose: The ethmoidal infundibulum is the most important of three infundibula of the nose: the frontal infundibulum and the maxillary maxillary infundibulum flow into it.
  • Ovary: The Infundibulum of uterine tube is the funnel-like end of the mammal oviduct nearest to the ovary.
  • Gallbladder: The Infundibulum of the gallbladder (also known as the "neck" of the gallbladder) is the end of nearest to the cystic duct, which is often dilated relative to the body of the gallbladder, and is a common site for gallstones. With a laparoscopic cholecystectomy operation, the dissection typically begins at the infundibulum.

Veterinary medicine[edit]


Other uses[edit]

  • Infundibulum is a genus of sea snail.
  • In the science fiction novel The Sirens of Titan by Kurt Vonnegut, a "chronosynclastic infundibulum" is a kind of wormhole through time and space, defined as "where all the different kinds of truths fit together".
  • In the fantasy novel Little, Big by John Crowley, the character Theodore Bramble considers "a peculiar geography I can only describe as infundibular ... I mean by this that the other world is composed of a series of concentric rings, which as one penetrates deeper into the other world, grow larger. The further in you go, the bigger it gets."
  • In geometry, infundibular refers to the arc of a sphere or any portion of a circle.

See also[edit]