The term striations (when
used in the context of the anatomy of muscle structures) refers to the
stripe-like visual features found in skeletal
These visual features consist of alternating light and dark striations
that can be observed using just a simple light microscope.
These striations are due
to the highly ordered arrangement of actin and myosin filaments
each myofibril and
the orderly arrangement of the myofibrils within the muscle
Each line or set of lines is given a letter name,
which is the accepted way to refer to specific parts of these striations.
These letter names are: A
The different types of muscle tissue are:
Muscle - muscles that move bones (under concious control).
Muscle - surrounding organs and other body structures (nor
under concious control).
Muscle - the specialised muscle found only in the heart.