Infundibulum

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

Anatomy[edit]

  • 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).
  • 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 infundibulum flow into it.
  • Ovary: The Infundibulum of uterine tube is the funnel-like end of the mammal oviduct nearest to the ovary.

Veterinary medicine[edit]

Botany[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]