Infundibulum
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.