Transcript 2nd lecture biomech

Musculoskeletal
System
Musculoskeletal System
Review
Anatomy:
• Skeletal system
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Bones
Cartilage
Tendons
Ligaments
Joints
• Muscular system
• Muscles
Physiology:
• Calcium storage
• Hematopoesis
• Protection
• Form/framework
• Joint articulation
Functions of the
Musculoskeletal System
• Gives the body shape
• Protects internal organs
• Provides for movement
• Consists of more than 600 muscles
• Muscles
- provide movement &
generate heat.
• Ligaments - connect bone to bone
injury = sprain
• Tendons
- connect bone to muscle
injury = strain
• Bones
- protection & shape
Anatomy
• Gives form to the body
The
Skeletal
• Protects
vital organs System
• Consists of 206 bones
• Acts as a framework for attachment of
muscles
• Designed to permit motion of the body
The Skull
The Neck
The Spinal Column
The Thorax
The Pelvis
The Lower Extremity
• Hip
• Thigh
• Knee
• Leg
• Ankle
• Foot
The Upper Extremity
• Shoulder girdle
• Arm
• Elbow
• Forearm
• Wrist
• Hand
Joints
Muscle
• It is the complex structure of body which help in different
functions.
Muscular System Functions
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Body movement
Maintenance of posture
Respiration
Production of body heat
Communication
Constriction of organs and vessels
Heart beat
Types of Muscle (1 of 2)
• Attached to the bones of the body
• Skeletal (voluntary) muscle
• Smooth (involuntary) muscle
• Carry out the automatic muscular functions
of the body
Types of Muscle (2 of 2)
• Cardiac muscle
• Involuntary muscle
• Has own blood supply and electrical system
• Can tolerate interruptions of blood supply
for only very short periods
Properties of Muscle
• Contractility
• Ability of a muscle to shorten with force
• Excitability
• Capacity of muscle to respond to a stimulus
• Extensibility
• Muscle can be stretched to its normal resting length and
beyond to a limited degree
• Elasticity
• Ability of muscle to recoil to original resting length after
stretched
end
Questions???