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1.04 Remember 1.04 Remember the structures the structures of the of the muscular muscular system system
| Date post: | 20-Jun-2015 |
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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 (many nuclei) muscle Multinucleated (many nuclei) muscle
cell bundlescell bundles
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1.04 Remember the structures of the muscular system
Structures of the muscular systemStructures of the muscular system
Smooth muscles Smooth muscles ((visceral muscles)
Only one nucleus located in the center
of the cell
Involuntary movement
Located in walls of internal organs
such as stomach, intestines, 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
Cardiac MuscleCardiac Muscle Found only in the heart Striated, branched Involuntary movement 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 systemStructures of the muscular system
Sphincter musclesSphincter musclesAlso called dilator musclesAlso called dilator musclesSpecial, circular musclesSpecial, circular musclesLocatedLocated
Between esophagus and stomachBetween esophagus and stomach Between stomach and small intestinesBetween stomach and small intestines Walls of the anusWalls of the anus Between the urinary bladder and the urethraBetween the urinary bladder and the urethra
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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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