The utricle and saccule are located within the inner ear, specifically within the membranous labyrinth. They are part of the vestibular system, which is responsible for balance and spatial orientation.

Here's a more detailed breakdown:

* Inner ear: This is the innermost part of the ear, containing the cochlea (for hearing) and the vestibular system (for balance).

* Membranous labyrinth: A system of interconnected fluid-filled tubes and sacs within the inner ear.

* Vestibular system: This system consists of the utricle, saccule, and three semicircular canals.

* Utricle and saccule: These are two small sacs that detect linear acceleration and gravity.

* Semicircular canals: These are three fluid-filled tubes that detect rotational movements.

So, the utricle and saccule are contained within the membranous labyrinth, which is part of the inner ear.