The<unk> s are three half-circular, interconnected tubes located inside each ear that are the equivalent of three gyroscopes located in three orthogonal planes.
The vertical<unk> s are positioned at an angle of about 100 degrees relative to one another, while the horizontal<unk>  makes an angle of about 95 degrees with the posterior<unk>  and an angle of about 110 degrees with the anterior<unk> . Deviations up to 10-15 degrees between individuals are normal. Because the angles between the<unk> s are not perpendicular, movements of the head stimulate horizontal and vertical<unk> s simultaneously.
The three<unk> s are:
Superior<unk> 
Posterior<unk> 
Horizontal<unk> 
Each<unk>  is filled with a fluid called endolymph and contains a motion sensor with little hairs (cilia) whose ends are embedded in a gelatinous structure called the cupula.
The<unk> s are a component of the Labyrinth.
Semicircular canal
Ear canal
Lacrimal canaliculi
Cauliflower ear
Outer ear
Nasolacrimal duct
Pilonidal sinus
Ranula