Transcript Muscular System

Muscular System
Types of Muscle
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Smooth – involuntary
 digestive
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system and blood vessels
Cardiac – heart
Skeletal – voluntary
 Over
600 muscles in human body
 They work in pairs: one muscle moves the bone in
one direction and the other moves it back again
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Muscle make up over half of body weight
Function of Skeletal Muscle
Support
 Allow bone movement
 Protects internal organs and stabilizes
joints
 Help maintain body temp
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Skeletal Muscle
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Every muscle is either a Flexor or an
Extender.
Flexors- Muscles that flex or bend a
joint.
Extenders- Muscles that extend or
straighten joints.
Origin- Where the muscle is anchored
to a bone to form a stationary
attachment.
Insertion- The point at which the
muscle is attached to a movable bone.
Belly – fleshy part of the muscle in
between the tendons that does the
actual contraction.
Names of Skeletal Muscle
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Location –
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Origin and Insertion –
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bicep, tricep, quadricep
Shape, size and direction –
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sternocleidomastoid
Number of Origins –
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tibialis anterior
rectus abdominis, gluteus maximus/medius/minimus
Function –
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adductors (pull leg together)
Muscles
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10 Tricep
Shoulder
 1 Deltoid
Abs (3)
 3 Rectus Abdominis
 7 Obliques
 4 Transverse
Abdominis
Legs (4)
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 5 Quadriceps
 12 Hamstrings
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 13 Gastrocnemius
 11 Gluteus
Back (2)
 8 Trapezius
 9Latissimus Dorsi  Connections
Chest
 Ligaments – connect
 6 Pectoralis
bone to bone
2 Bicep
 Tendons- connect
muscle to bone