The Orbicularis Oris Muscle

Question

The orbicularis oris muscle
A) surrounds the mouth.
B) flexes the head.
C) is the smiling muscle.
D) closes the eye.

Accepted Answer

The orbicularis oris muscle surrounds the mouth and is responsible for controlling lip movements, including closing and puckering the lips. It is also involved in facial expressions such as smiling and frowning. It is not responsible for flexing the head or closing the eyes.