Pronunciation: [juːtɹˈɪkjʊləs] (IPA) 
The correct spelling of the word "utriculus" is with a "u" rather than an "o." Its IPA phonetic transcription is [uˈtrikjulus]. The first syllable is an unstressed "u," which is pronounced like the "u" in "but." The second syllable has stress and starts with the "t" sound, followed by a rolled "r," and then the "i" sound, like the "ee" in "seed." The final syllable has an "l" sound, followed by a "yoo" sound and "s" at the end.
The term "utriculus" refers to a small sac-like structure found in various organisms, particularly in the animal kingdom. In anatomy, specifically in vertebrates and certain invertebrates, the utriculus is a component of the vestibular organ located in the inner ear. It is in the form of a rounded pouch, typically filled with fluid, and is an integral part of the membranous labyrinth.
The utriculus plays a crucial role in sensing and regulating balance and spatial orientation. It contains sensory receptor cells, known as hair cells, which are responsible for detecting the movement of fluid within the utriculus. These hair cells convert mechanical stimuli into electrical signals that are transmitted to the brain via the vestibular nerve. This information is then processed by the brain to maintain postural control, coordinate eye movements, and facilitate orientation in the surrounding environment.
The utriculus also aids in the detection of linear acceleration, such as forward or backward movement. When the body experiences linear accelerations, the fluid within the utriculus moves, leading to the displacement of hair cells and the generation of the aforementioned electrical signals.
Overall, the utriculus serves as a vital component of the vestibular system, contributing to the maintenance of equilibrium, balance, and coordination in animals. By detecting the positioning and movement of the body in relation to gravity and other external stimuli, the utriculus plays a key role in enabling organisms to navigate their surroundings with stability and accuracy.
Utricle, the larger of the two membranous sacs in the vestibule of the labyrinth, lying in the recessus ellipticus; from it arise the semicircular ducts.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
A kind of fruit with an inflated covering; a little bladder filled with air, attached to certain aquatic plants.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "utriculus" is derived from Latin. It comes from the Latin noun "utriculus", which means "small bag" or "small bottle". It is the diminutive form of the Latin noun "uter", meaning "leather bag" or "bladder". In anatomical and biological contexts, "utriculus" is often used to refer to structures resembling small pouches or sacs, such as the utricle in the inner ear.
