Mmhs anatomy and physiology
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MMHS Anatomy and Physiology. muscle introduction notes. General Characteristics. 600 muscles in the human body Makes up 40% of the body weight 3 main types that make up the human body Viewed as “the machines” of the body Prefixes associated with muscles myo - and mys - = “muscle”

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Mmhs anatomy and physiology

MMHS

Anatomy and Physiology

muscle introduction notes


General characteristics

General Characteristics

  • 600 muscles in the human body

  • Makes up 40% of the body weight

  • 3 main types that make up the human body

  • Viewed as “the machines” of the body

  • Prefixes associated with muscles

    • myo- and mys- = “muscle”

    • Sarco = “Flesh”

    • Globin = “protein”


Muscle properties

Muscle Properties

  • Muscles can only contract or shorten.

  • Muscles can’t PUSH, they only PULL.

  • Muscle occur in opposing pairs.

    • Prime Mover:causes the main movement.

    • Antagonist: opposes or reverses a movement.

      Example:The Prime Mover is the biceps brachiiand the Antagonist is the triceps brachii.

  • Body building adds very little new muscle but instead adds filaments and fluid.

    (these additions make muscles work more efficiently).


The 3 types of muscle

The 3 Types of Muscle

  • Skeletal or Striated Muscle

    • Long and cylindrical with many nuclei (=multinucleate)

    • Under both Voluntary and Involuntary Movement

  • Tendons attach muscle to bone at 2 points.

    • Origin:stationary muscle point (anchor)

    • Insertion: movable attachment point

  • Skeletal Muscles occur in pairs that have opposing motion.

    • Flexors: decrease the angle between parts.

    • Extensors:increase the angle between parts.

      Example: The biceps brachiiis the flexor and the triceps brachiiis the extensor.


Skeletal muscle

Skeletal Muscle


Muscle properties1

Muscle Properties

4 Main Properties of Skeletal Muscles

  • Contractibility:shorten with force.

  • Elasticity:will return to its original form.

  • Excitability: responds to a stimulus (nerve)

  • Extensibility:can be stretched.


3 types of muscles

3 Types of Muscles

  • Smooth Muscle

  • Spindle-shaped with 1 nucleus (uninucleate)

  • Involuntary Movement

  • Located in digestive, urinary tracts, and vascular system.

    Peristalsis: the term for the rhythmic, synchronized contraction of smooth muscle.


Skeletal muscle1

Skeletal Muscle


3 types of muscle

3 Types of muscle

3. Cardiac or Myocardium

  • Found only in heart tissue.

  • Striated with 1 nucleus and intercalated discs.

  • Involuntary (about 86,400 beats/day)

  • Pacemakers (SA node of right atrium) artificially controls the rhythm of the heart.


Cardiac muscle

Cardiac Muscle


The beauty of human movement

The Beauty of Human Movement

YOGA


The beauty of human movement1

The Beauty of Human Movement

Capoeira


The beauty of human movement2

The Beauty of Human Movement

Capoeira


The beauty of human movement3

The Beauty of Human Movement

Surfing


The beauty of human movement4

The Beauty of Human Movement

Climbing


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