Ch 8 Muscular System

Ch 8 Muscular System

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Skeletal Muscle Tissue

Attached to the skeleton  Voluntary Long, cylindrical Has Striations Speed of contraction: Most Rapid Strength of contraction: Greatest Ability to remain contracted: Least 

Skeletal Muscle 2 (binary/octet-stream)

Smooth Muscle Tissue

In walls of hollow organs Involuntary Spindle-Shaped No Striations  Speed of contractions: slowest Strength of contraction: Least  Ability to remain contracted: Greatest 

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Cardiac Muscle Tissue

In walls of heart Involuntary Cylindrical, branching Has striations  Speed of contraction: intermediate Strength of contractions: Intermediate  Ability to remain contracted: intermediate 

414c Cardiacmuscle (binary/octet-stream)

How A Muscle Contracts

Muscular System Diagram

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Hypotrophy

When muscles enlarge in size of muscles  Enlargment of a muscle is mainly due to an increase in the size of muscle fibers

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Muscular Distrophy

Results in a decrease of muscle strength at the rate of 5% each day. Most of the muscle tissue is replaced by fibrous connective tissue, making muscle rehabilitation nearly impossible 

Muscular Dystrophy Explained (binary/octet-stream)