Final answer:
The levator anguli oris muscle is located underneath the skin at the corners of the mouth and helps raise the corners of the mouth to produce a smile or a smirk.
Step-by-step explanation:
The levator anguli oris muscle is located underneath the skin at the corners of the mouth. It is a muscle of facial expression that helps raise the corners of the mouth to produce a smile or a smirk.
The levator anguli oris works in conjunction with other muscles, such as the orbicularis oris, which circles the lips, to control the movement and shape of the mouth. These muscles are responsible for various facial expressions, including smiling, frowning, and puckering the lips.
In summary, the levator anguli oris muscle is located underneath the skin at the corners of the mouth and is involved in controlling the movement and shape of the mouth for facial expressions.