all Body Movement of the:

• Skeleton
• Heart
• Bloood Vessels
• Hollow visceral organs

• Skeletal muscle
  
• Cardiac muscle
  
• Smooth muscle

Skeletal muscle tissue: Epimysium (outside)

Skeletal muscle bundle (fascicle): Perimysium (around)

Skeletal muscle fiber (cell): Endomysium (inside)

• Dense irregular CT
• Surrounds the whole muscle
• Function- separates muscle from other tissues

• Dense irregular CT
• Surrounds bundles of muscle fibers
• Forms bundles called fascicles
• Function- carry lrg bl. vessels & nerves

• Loose CT
• Surrounds each muscle fiber (cell)
• Function- carry sm. bl. vessels & nerves

• Attaches muscle to the periosteum of the bone
• A lot of collagen fibers (Sharpey's) help anchor to the underlying bone

• Thin actin filaments
• Thick myosin filaments

• Striated
• Multinucleate (>1 nucleus)
• Cannot divide
• Stem cells called myosatelite cells- divide & fuse into adult skel. musc. fibers
• Muscle hypertrophy after exercise
• Ltd. ability to repair itself

innervated by motor neurons of the Somatic Nervous System- no consious control

to :

• Contract

&

• live

• Sacroplasmic reticulum (SR)
• Transverse tubules (T Tubes)

• Store calcium
• Release calcium to begin muscle contraction

• thin actin filaments slide over thick myosin filaments
• End result=  sacromere shortens

• I bands- thin filaments/form Light band
• A bands- thick filaments/ form Dark band

• A band at the center
• 1/2 of an I band on each end
• M line at center
• Z line at the ends

• T tubes carry action potentials

which leads to..

• SR releasing calcium

which leads to..

• Interaction b/w thin & thick filaments

which leads to..

• Muscle contraction

1. Tight Junction

2. Adhering Junction

3. Gap Junction

• forms barriers b/w adjacent cells
• controls  passage of water & solutes b/w cells

• very strong
• AKA Desmosomes
• attaches adjacent cells to each other

• forms channels b/w adjacent cells
• allows communication b/w cells
• allows ions to pass b/w cells

• Striated
• Mononucleate
• most myoblasts do not fuse during dev.
• seldom divide
• hypertrophy
• SR & T tubes
• Thick & thin filaments org. into sacromeres

• composed of adhering & gap junctions
• Function- allow synchronized muscle contraction

• contracts more slowly than skeletal muscle
• fairly resistant to fatigue

innervated by motor neurons of the autonomic nervous system- conscious control

• Nonstriated
• Mononucleate
• myoblasts do not fuse during dev.
• can divide
• hypertrophy
• no T tubes
• no sacromeres
• thick and thin filaments which are scattered

• have gap junctions b/w adjacent cells

which leads to..

• peristalic wave of contraction

• no gap junctions
• no peristalic wave

• more slowly than cardiac
• very resistant to fatigue

• innervated by motor neurons of the autonomic nercous system - no conscious control
• only regulates rate & strength of contraction

Summary

skeletal muscle tissue

• Striated
• voluntary
• multinucleate
• biggest of the muscle cells
• big cylinders

Summary

cardiac muscle tissue

• striated
• involuntary
• mononucleate
• medium sized
• smaller cylinders w/ extensions

Summary

smooth muscle tissue

• nonstriated
• involuntary
• mononucleate
• smallest
• shindle-shaped