Infundibulum

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

==Anatomy== Brain: the pituitary stalk, also known as the infundibulum and infundibular stalk, is the connection between the hypothalamus and the posterior pituitary. Hair follicle: the infundibulum is the cup or funnel in which a hair follicle grows. Infundibulum (heart): The infundibulum of the heart, or conus arteriosus, is the outflow portion of the right ventricle. Lung: The alveolar sacs of the lungs, from which the air chambers (alveoli) open, are also called infundibula. Sinus (anatomy): The ethmoidal infundibulum is the most important of three infundibula of the nose: the frontal infundibulum and the maxillary infundibulum flow into it. Infundibulum of uterine tube: 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. Renal pelvis, sometimes called the renal infundibulum