1.1.04 Remember the structures of the muscular system
2.1.04 Remember the structures of the muscular system
Essential Question
What are the structures of the muscular system?
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3.1.04 Remember the structures of the muscular system
The Muscular System
Comprises nearly half our weight.
Over 650 muscles.
Each muscle is made up of hundreds or thousands of muscle fibers.
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4.1.04 Remember the structures of the muscular system
The Muscular System:Muscle Fibers
Bundles of threadlike structures called myofibrils
Composed of:
Myosin
Actin
Form overlapping pattern called sarcomere
muscle muscle fiber
sarcolemma sarcomere
functional unit of muscle movement
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5.1.04 Remember the structures of the muscular system
Structures of the muscular system
Muscles
Skeletal
Smooth
Cardiac
Sphincter
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Connective tissue
Tendons
Fascia
6.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of muscle
Skeletal
Smooth
Cardiac
Sphincter
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7.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of Muscle
Skeletal muscles
Attached to bone
Striated (striped) appearance
Voluntary
Multinucleated muscle cell bundles
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8.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of Muscle
Smooth muscles
Also known as visceral muscles
Involuntary
Located in walls of digestive system, uterus & blood vessels
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9.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of Muscle
Cardiac muscle
Found only in the heart
Striated, branched
Involuntary
Cells are fused- when one contracts, they all contract, creating the heartbeat
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10.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of Muscle
Sphincter muscles
Also called dilator muscles
Special, circular muscles
Located in the
digestive system
urinary system
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11.1.04 Remember the structures of the muscular system
Structures of the muscular system
Types of Muscle
Skeletal
Smooth
Cardiac
Sphincter
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12.1.04 Remember the structures of the muscular system
Structures of the muscular system
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Types of Connective tissue
Tendons
Fascia
13.1.04 Remember the structures of the muscular system
Structures of the muscular system
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Connective tissue
Tendons
dense bands that connect skeletal muscle to the bone
14.1.04 Remember the structures of the muscular system
Structures of the muscular system
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Connective tissue
Fascia
Fibrous connective tissue sheets that wrap around muscle bundles
15.1.04 Remember the structures of the muscular system
How do skeletal muscles get their names?
Location
Size
Direction
Number of origins
Location of origin and insertion
Action flexor
Extensor
Depressor
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However,
not all muscles are named by the above methods!
16.1.04 Remember the structures of the muscular system
Head & Neck Muscles
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17.1.04 Remember the structures of the muscular system
Torso/Trunk(anterior)
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18.1.04 Remember the structures of the muscular system
Torso/Trunk(anterior)
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19.1.04 Remember the structures of the muscular system
Torso/Trunk(posterior)
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20.1.04 Remember the structures of the muscular system
Upper extremities
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21.1.04 Remember the structures of the muscular system
Lower extremities
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22.1.04 Remember the structures of the muscular system
The muscular system reviewAnterior view
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23.1.04 Remember the structures of the muscular system
The muscular system reviewPosterior view
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24.1.04 Remember the structures of the muscular system
1.04 Remember the structures of the muscular systemEssential Question
What are the structures of the muscular system?
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