Facial muscles are unusual in that they

A) represent a combination of first-class and second-class lever systems.
B) insert and sometimes originate on skin and connective tissue.
C) are smooth muscles rather than skeletal muscles.
D) are not involved in movement.
E) are not involved in facial expression.

Connective Tissue

A type of tissue within the body that supports, binds together or separates other tissues and organs, varying in density and function.

Smooth Muscles

Involuntary muscles found in the walls of internal organs and blood vessels, controlling movements within the body's systems.

Skeletal Muscles

Skeletal muscles are voluntary muscles attached to bones by tendons, responsible for movement of the body by contraction.