Main Page | See live article | Alphabetical index An infundibulum is a funnel-shaped cavity or organ. The alveolar sacs of the lungs from which the air chambers (alveoli) open are called infundibula and the end of the mammalian oviduct nearest to the ovary also bears this name. A small outgrowth of the ventral wall of the embryonic brain from which the pars nervosa of the posterior lobe of the pituitary gland develops is also called the infundibulum. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.