The Muscular System

The Muscular System

2022 - 2023 School Year

Introduction

> 639 muscles in your body

- They make up ~40% of your weight

• Smallest Muscle - stapedius

• Largest Muscle - gluteus maximus

• Involuntary

• Striated and branched

• ONLY in the heart

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Cardiac Muscle Tissue

• No striations and uncbranched

• Involuntary

• In digestive tract and blood vessels

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Smooth Muscle Tissue

• Striated and unbranched

• both voluntary and involuntary

• Multinucleated

• Attatched to bones

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Skeletal Muscle Tissue

Multiple Select

Which of the following muscle tissues are involuntary?

• Skeletal

• Cardiac

• Smooth

Muscle Strain

: Pulled muscle

Muscle Soreness

: When muscle usage is greater than normal, microscopic tears occur in muscles.

Muscle Hypertrophy

: Overuse of muscle, resulting in increase in size

Muscle Atrophy

: Underuse of muscle, resulting in decrease in size

Poll

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