Muscle 

The picture " " can link to it's
corresponding histological photograph. 

The picture " " can link to it's
corresponding histological drawing.

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A. Skeletal muscle

   NE-1-c Voluntary muscle, HE


¡@a. Longitudinal section


»»  Nuclei shape & position
»»  Sarcoplasm
»»  Myofibrils
»»  Cross striations
»»  Sarcolemma
»»  Intermuscular connective tissue

¡@b. Cross section

»»  Epimysium
»»  Perimysium
»»  Endomysium
»»  Fasciculi - demarcated by the perimysium
»»  Individual muscle fibers - rounded or polygonal
»»  Nuclei
»»  Sarcoplasm
»»  Myofibrils
»»  Sarcolemma

   NA-4-c Muscle-tendon junction,HE

2 sets of slide, one pink color, another orange color

 Orange slide:

»»  Interdigitation in tendon-muscle junction

Pink slide:

»»  Striated muscle (red) and tendon (pink) arranged side by side

B. Cardiac muscle

   3. NE-2-j (Heart muscle)
   4. NE-2-l ( heart muscle, human Purkinje fiber)



a. Longitudinal section

»»  Nuclei shape & position
»»  Sarcoplasm - abundant near the nucleus
»»  Myofibrils - coarser than those in skeletal muscle
»»  Cross striation- not as clearly visible as in skeletal muscle
»»  Intercalated disk-deeply stained
»»  Sarcolemma
»»  Branching of fibers

b. Cross section
Note the different sizes of the muscle fibers
* Various section (LS, CS & OS) may be seen in one slide

»»  Nuclei position & shape
»»  Sarcoplasm
»»  Myofibrils - often show a radial arrangement
»»  Sarcolemma

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C. Smooth muscle

   NR-3-e Smooth muscle

LS, CS & OS, Uterus, Human, HE
Observe the LS, CS & OS of the smooth muscle

 Nuclei

»»  - with fine chromatin granules
»»  - Does nucleus change its shape during muscle contraction?
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