1.04 Remember the structures of the muscular system...the muscular system Structures of the muscular...
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1.04 Remember the structures of the muscular system
Transcript of 1.04 Remember the structures of the muscular system...the muscular system Structures of the muscular...
1.04 Remember
the structures
of the
muscular system
1.04 Remember the structures of
the muscular system
Essential Question
• What are the structures of the muscular system?
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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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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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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
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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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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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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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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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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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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1.04 Remember the structures of
the muscular system
Structures of the muscular system
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Types of Connective tissue
Tendons
Fascia
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
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
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!
1.04 Remember the structures of
the muscular system
Head & Neck Muscles
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1.04 Remember the structures of
the muscular system
Torso/Trunk (anterior)
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1.04 Remember the structures of
the muscular system
Torso/Trunk (anterior)
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1.04 Remember the structures of
the muscular system
Torso/Trunk (posterior)
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1.04 Remember the structures of
the muscular system
Upper extremities
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1.04 Remember the structures of
the muscular system
Lower extremities
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1.04 Remember the structures of
the muscular system
The muscular system review Anterior view
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1.04 Remember the structures of
the muscular system
The muscular system review Posterior view
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1.04 Remember the structures of
the muscular system
1.04 Remember the structures of the
muscular system
Essential Question
• What are the structures of the muscular system?
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