<Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2007) (Learn how and when to remove this template message) </Td> </Tr> <P> Speech organs or articulators, produce the sounds of language . Organs used for speech include the lips, teeth, alveolar ridge, hard palate, velum (soft palate), uvula, glottis and various parts of the tongue . They can be divided into two types: passive articulators and active articulators . Active articulators move relative to passive articulators, which remain still, to produce various speech sounds, in particular manners of articulation . The upper lip, teeth, alveolar ridge, hard palate, soft palate, uvula, and pharynx wall are passive articulators . The most important active articulator is the tongue as it is involved in the production of the majority of sounds . The lower lip is another active articulator . But glottis is not an active articulator because it is only a space between vocal folds . </P>

Alveolar ridge is a movable organ of speech