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ANATOMY Unit 4 Notes: Muscle Parts

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Presentation on theme: "ANATOMY Unit 4 Notes: Muscle Parts"— Presentation transcript:

1 ANATOMY Unit 4 Notes: Muscle Parts

2 (1) Types of Muscle Skeletal Cardiac Smooth

3 Cardiac Muscle Skeletal Muscle Smooth Muscle

4 (2) Skeletal Muscle Type of Movement: Location: Voluntary
Allows overall body mobility Contracts fast w/great force, tires fast also Location: On top of bones & connecting them

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6 (3) Cardiac Muscle Types of Movement: Location: Involuntary
Steady, consistent movement Heartbeat (rate gauged by nervous system) Location: heart

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8 (4) Smooth Muscle Type of Movement: Location: Involuntary
Slower, yet consistent movement Forces fluids & solids through channels Location: Digestive & excretive organs Respiratory passageways

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10 (5) Muscle Function Produce movement Maintain posture Stabilize joints
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

11 (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

12 Thick Filament (myosin)
Fascicle Muscle (organ) Muscle Fiber (cell) Myofibril Muscle Fiber (with many nuclei) Sarcomere Thin Filament (actin) Thick Filament (myosin)

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