Download Structures of the muscular system

1.04
Remember
the structures
of the
muscular
system
Essential Question
What are the structures of the muscular system?
1.04 REMEMBER THE STRUCTURES OF THE MUSCULAR
SYSTEM
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Introduction
https://www.youtube.com/watch?v=HIZSi5oghaU
https://www.youtube.com/watch?v=98u7ZkOocbI
Warm up
Using dry erase boards, brainstorm as a table
the names you think your muscles should be
called. Each group will share their results.
Name and demonstrate the muscles you are
familiar with.
The Muscular System
Comprises nearly half our weight.
Over 650 muscles.
They produce most of our body heat.
Each muscle is made up of hundreds or thousands of
muscle fibers.
What are these called?
1.04 REMEMBER THE STRUCTURES OF THE MUSCULAR
SYSTEM
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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
1.04 REMEMBER THE STRUCTURES OF THE MUSCULAR
SYSTEM
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Structures of the muscular system
Muscles
 Skeletal
 Smooth
 Cardiac
Connective tissue
 Tendons
 Fascia
 Sphincter
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SYSTEM
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Structures of the muscular system
Types of muscle
 Skeletal
 Smooth
 Cardiac
 Sphincter
1.04 REMEMBER THE STRUCTURES OF THE MUSCULAR
SYSTEM
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Structures of the muscular system
Types of Muscle
Skeletal muscles
Attached to bone
Striated (striped) appearance
Voluntary
Multinucleated muscle cell bundles
Contract quickly, fatigue easily, can’t maintain
contraction for long period of time
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SYSTEM
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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
◦INVOLUNTARY
◦Controlled by autonomic nervous system
◦Act slowly, do not tire easily, can remain
contracted for long time
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SYSTEM
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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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SYSTEM
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Structures of the muscular system
Types of Muscle
Sphincter muscles
Also called dilator muscles
Special, circular muscles
Located in the
 Digestive system- of esophagus
stomach and small intestine, anus,
and mouth.
 Urinary System- urethera
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SYSTEM
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Structures of the muscular system
Types of Muscle Review
 Skeletal
 Smooth
 Cardiac
 Sphincter
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SYSTEM
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Structures of the muscular system
Types of Connective tissue
 Tendons
 Fascia
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SYSTEM
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Structures of the muscular system
Connective tissue
 Tendons
dense bands that connect skeletal muscle to
the bone
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SYSTEM
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Structures of the muscular system
Connective tissue
 Fascia
Fibrous connective
tissue sheets that wrap
around muscle bundles
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SYSTEM
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How do skeletal muscles get their
names?
Location
Size
Location of origin and insertion
Action flexor
Direction
Extensor
Number of origins
Depressor
• However,
• not all muscles are named by the above methods!
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Head & Neck Muscles
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SYSTEM
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Torso/Trunk
(anterior)
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Torso/Trunk
(anterior)
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Torso/Trunk
(posterior)
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SYSTEM
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Upper extremities
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Lower extremities
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The muscular system review
Anterior view
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SYSTEM
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The muscular system review
Posterior view
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SYSTEM
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1.04 Remember the structures of the
muscular system
Essential Question
What are the structures of the muscular system?
1.04 REMEMBER THE STRUCTURES OF THE MUSCULAR
SYSTEM
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Processing
Muscle Labeling Activities 1,2 &3 - See
Figures 7-6 and 7-7 pg 201-204 in text.
Muscle Matching I, Muscle Locations Word
Search
Videos:
https://www.youtube.com/watch?v=suXNgpcakU
https://www.youtube.com/watch?v=3G3JwZAZLk