In infants, which muscle allows for the mouth to form a tight fit around the nipple during suckling at the breast?
A) masseter
B) buccinator
C) orbicularis oris
D) risorius
E) levator labii

Question

Quizplus · Accepted Answer

The orbicularis oris is the muscle that encircles the mouth, allowing it to form a tight fit around the nipple during suckling at the breast. The masseter, risorius, buccinator, and levator labii muscles do not directly contribute to this action.

In Infants, Which Muscle Allows for the Mouth to Form