What muscles of facial expression contract for you to smile. Concept introduction: Muscle is defined as the soft tissue found in animals and humans. There are three types of muscles are: striated muscle, non-striated, and cardiac muscle. It is composed of actin and myosin protein filaments that slide one another and cause contraction of muscle. It helps to produce force and motion.

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Chapter 11.3, Problem 6WDYL

Summary Introduction

To determine:

What muscles of facial expression contract for you to smile.

Concept introduction:

Muscle is defined as the soft tissue found in animals and humans. There are three types of muscles are: striated muscle, non-striated, and cardiac muscle. It is composed of actin and myosin protein filaments that slide one another and cause contraction of muscle. It helps to produce force and motion.

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