anatomy unit 5 skeletal and muscular systems muscle types notes

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ANATOMY Unit 5 Notes: Muscle Parts

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Page 1: Anatomy unit 5 skeletal and muscular systems muscle types notes

ANATOMY

Unit 5 Notes:Muscle Parts

Page 2: Anatomy unit 5 skeletal and muscular systems muscle types notes

(1) Types of Muscle

•Skeletal

•Cardiac

•Smooth

Page 3: Anatomy unit 5 skeletal and muscular systems muscle types notes

Cardiac Muscle

Skeletal Muscle

Smooth Muscle

Page 4: Anatomy unit 5 skeletal and muscular systems muscle types notes

(2) Skeletal Muscle• Type of Movement:

– Voluntary– Allows overall body mobility– Contracts fast w/great force, tires fast also

• Location:– On top of bones & connecting them

Page 5: Anatomy unit 5 skeletal and muscular systems muscle types notes
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(3) Cardiac Muscle• Types of Movement:

– Involuntary– Steady, consistent movement– Heartbeat (rate gauged by nervous system)

• Location:– heart

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Page 8: Anatomy unit 5 skeletal and muscular systems muscle types notes

(4) Smooth Muscle• Type of Movement:

– Involuntary– Slower, yet consistent movement– Forces fluids & solids through channels

• Location:– Digestive & excretive organs– Respiratory passageways

Page 9: Anatomy unit 5 skeletal and muscular systems muscle types notes
Page 10: Anatomy unit 5 skeletal and muscular systems muscle types notes

(5) Muscle Function• Produce movement

– Bones = attachment points– Internal organs (move nutrients, waste, etc.)

• Maintain posture– Unique to Bipedalism

• Stabilize joints– Allows for wider range of movement and use of

force

• Generate heat– During contraction

Page 11: Anatomy unit 5 skeletal and muscular systems muscle types notes

(6) Levels of Organization

• Muscle (whole organ)• Fascicle (portion of muscle)• Muscle Fiber (single muscle cell)• Myofibril (muscle cell organelle)• Sarcomere (portion of myofibril)• Myofilaments—Actin + Myosin

(part of sarcomere)

Macroscopic

Microscopic

Page 12: Anatomy unit 5 skeletal and muscular systems muscle types notes

Muscle (organ)Fascicle

Muscle Fiber (cell)

Muscle Fiber (with many nuclei)

Myofibril

Sarcomere

Thin Filament (actin)

Thick Filament (myosin)

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