soft palate

soft part of the roof of the mouth located in the rear near the throat

The soft palate (or velum, or muscular palate) is the soft tissue constituting the back of the roof of the mouth. The soft palate is distinguished from the hard palate at the front of the mouth in that it does not contain bone.
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Soft palate n. The movable fold, consisting of muscular fibers enclosed in mucous membrane, that is suspended from the rear of the hard palate and [more]Soft palate - Community and Resources

Noun
1. a muscular flap that closes off the nasopharynx during swallowing or speaking
(synonym) velum
(hypernym) flap
(part-holonym) palate, roof of the mouth
(part-meronym) uvula

The muscular part of the roof of the mouth. The soft palate is directly behind the hard palate. It lacks bone and so is soft.