uterus A pear-shaped hollow female reproductive
organ in the pelvis area, at the top of the vagina, where
eggs are fertilized and/or development of the young
occurs.
utricle The larger of two membranous sacs (the other
is the saccule) within the vestibule, the cavity at the
entrance to the bony labyrinth of the inner ear. The
utricle contains receptors for balance and a macula that
isresponsive to linear acceleration. The macula is a
group of hair cells residing in either the saccule or the
utricle and covered with gelatinous material containing
otoliths, which are small granules of calcium carbon-
ate. The ear’s semicircular canals lead to and from the
utricle.utricle 335