What is the name of the muscle that compresses the cheeks and expels air between the lips?

The muscle that compresses the cheeks and helps expel air between the lips is the buccinator. This muscle is located in the cheek area and plays a crucial role in various functions, such as playing wind instruments, blowing, and chewing. It helps keep the food positioned between the teeth during mastication and prevents the accumulation of food in the vestibule of the mouth. The buccinator also aids in actions like puffing out the cheeks, which is essential for activities that require forceful expulsion of air.

Understanding the specific actions and functions of facial muscles is important for estheticians, as they may work with clients on techniques involving facial expressions and oral hygiene. Knowing the buccinator's role can also enhance the ability to offer advice on cosmetic procedures and treatments that involve the lower facial structure.