Liha töötlemine
part because of the diversity of actions they Myofibrils are the contractile “machinery”
are asked to perform. Much of this diversity of the cell and, like the cells where they
occurs not only at the gross level, but also at reside, are very highly organized. When
the muscle cell (fiber) level. First, not only examining a myofibril, one of the first obser-
do muscles vary in size, they can also vary vations that can be made is that the cylindri-
in the number of cells. For example, the cal organelle is made up of repeating units.
muscle that is responsible for adjusting the These repeating units are known as sarco-
tension of the eardrum (tensor tympani) meres. Contained in each sarcomere are all
has only a few hundred muscle cells, while the structural elements needed to perform the
the medial gastrocnemius (used in humans physical act of contraction at the molecular
annaabi.ee 
