The organs of static and dynamic equilibrium both contain hair cells, with stereocilia embedded in a gelatinous mass.

Stereocilia

Hairlike projections on the surface of certain cells, such as those in the inner ear, involved in mechanosensing.

Dynamic Equilibrium

A state of balance between continuing processes, often referring to the balance of substances in a biological system or to the balance of forces in a mechanical system.

Gelatinous Mass

A jelly-like substance, often found in the body as part of various structures or tissues.