Striated muscle                                 Chart

                           
Cell types: Muscle cell (myocyte)
 

Differential diagnosis:
 Other muscle types such as smooth muscles do not have striations. Be careful! Striations are only seen in longitudinal sections and not transverse sections. Cardiac musculature has striations but fibers are branching and are also provided with intercalated discs.

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Diagnostic Features:
a. Tissue is compact (e.g. liver)
b. Cross striations which are both transverse and longitudinal seen in parallel running fibers representing myofibrils.
c. Striations are in form of crosses in most cases and prominent in longitudinal sections.
d. Transverse sections present with cross sectioned fibers which are then seen as dots with nuclei placed eccentrically.
e. Nuclei are placed eccentrically and cells are multinucleate. Cells may be fusiform shaped and long.
f. Examples include all skeletal or voluntary muscles of the body.

Draw your own section here and make your diagnosis by data base selection below

 

 

 

 

 

 

 

 

 

 

 

 

 

Database selection: Practical Tissue Gross

Level 1: Select  compact
Level 2: Select muscular tissue from the list of sclerous, muscular, connective, organ-glands and nervous tissues. This is due to parallel running fibers and fusifom shaped cells which are long.
Level 3: Select stripes since stations are see n on longitudinal sections only.
Note syncytium (especially on transverse section) and no branching of sarcomere (muscle cell). Also note the eccentric nuclei.

Do you think this is a section of cardiac, skeletal or smooth muscles?

 

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