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- 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.
- Tooth: In horses, other equines and ruminants, the infundibulum of a tooth is the central cup or funnel of enamel and cementum.
- In plant morphology, infundibular means funnel-shaped, for example referring to the corolla of some flowers.
- 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.
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