Lips

Question 1

orbicularis oris

Answer 1

facial expression lip muscles

Question 2

risorius

Answer 2

muscles pulling back from your lips

Question 3

lip posture affects

Answer 3

vocal tract length

Question 4

lip protrusion increased

Answer 4

vocal tract length and a bass resonance is produced

Question 5

lip spreading shortens

Answer 5

vocal tract and a treble resonance is produced