1.04 Remember the structures of the muscular system.
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1.04 Remember 1.04 Remember the structures the structures of the of the muscular muscular system system
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Transcript of 1.04 Remember the structures of the muscular system.
1.04 Remember 1.04 Remember the structures the structures
of the of the muscular systemmuscular system
1.04 Remember the structures of the muscular system
Essential QuestionEssential Question
• What are the structures of the muscular system?
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1.04 Remember the structures of the muscular system
The Muscular SystemThe 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 SystemThe Muscular System::Muscle FibersMuscle 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 systemStructures of the muscular system
MusclesMuscles
Skeletal
Smooth
Cardiac
Sphincter
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Connective tissueConnective tissue
Tendons
Fascia
1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
Types of muscleTypes of muscle
Skeletal
Smooth
Cardiac
Sphincter
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1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
Types of MuscleTypes of Muscle
Skeletal musclesSkeletal muscles
Attached to boneAttached to bone
Striated (striped) appearanceStriated (striped) appearance
VoluntaryVoluntary
Multinucleated muscle cell bundlesMultinucleated muscle cell bundles
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1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
Types of MuscleTypes of Muscle
Smooth musclesSmooth 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 systemStructures of the muscular system
Types of MuscleTypes of Muscle
Cardiac muscleCardiac muscleFound only in the heartStriated, branchedInvoluntaryCells 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 systemStructures of the muscular system
Types of MuscleTypes of MuscleSphincter musclesSphincter musclesAlso called dilator musclesAlso called dilator musclesSpecial, circular musclesSpecial, circular musclesLocated in the Located in the
digestive systemdigestive system urinary systemurinary system
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1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
Types of MuscleTypes of Muscle
Skeletal
Smooth
Cardiac
Sphincter
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1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
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Types of Connective tissueTypes of Connective tissue
Tendons
Fascia
1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
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Connective tissueConnective tissue
Tendons
dense bands that connect skeletal muscle
to the bone
1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
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Connective tissueConnective tissue
FasciaFascia
Fibrous connective tissue sheets that wrap around muscle bundles
1.04 Remember the structures of the muscular system
How do skeletal muscles get How do skeletal muscles get their names?their names?
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• However, However, • not all muscles are named by the above methods!not all muscles are named by the above methods!
1.04 Remember the structures of the muscular system
Head & Neck MusclesHead & Neck Muscles
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1.04 Remember the structures of the muscular system
Torso/TrunkTorso/Trunk(anterior)
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1.04 Remember the structures of the muscular system
Torso/TrunkTorso/Trunk(anterior)
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1.04 Remember the structures of the muscular system
Torso/TrunkTorso/Trunk(posterior)
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1.04 Remember the structures of the muscular system
Upper extremitiesUpper extremities
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1.04 Remember the structures of the muscular system
Lower extremitiesLower extremities
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1.04 Remember the structures of the muscular system
The muscular system reviewThe muscular system reviewAnterior viewAnterior view
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1.04 Remember the structures of the muscular system
The muscular system reviewThe muscular system reviewPosterior viewPosterior view
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1.04 Remember the structures of the muscular system
1.04 Remember the structures of the 1.04 Remember the structures of the
muscular systemmuscular system
Essential QuestionEssential Question• What are the structures of the muscular
system?
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