lihasrakud
Lihasrakud (Estonian for muscle cells) are the basic cellular units of muscle tissue. They are specialized for contraction and are responsible for producing force and movement. In vertebrates, three main categories of muscle tissue are recognized: skeletal muscle cells, cardiac muscle cells, and smooth muscle cells.
Skeletal muscle cells are long, cylindrical, multinucleated cells that form the voluntary muscles attached to bones.
Cardiac muscle cells are shorter, usually branched cells connected by intercalated discs. They form the heart
Smooth muscle cells are spindle-shaped, non-striated cells found in the walls of hollow organs and blood vessels.
Structure and mechanism: Lihasrakud contain a plasma membrane (sarcolemma), cytoplasm (sarkoplasma), and numerous myofibrils arranged into
Development and regeneration: Skeletal muscle has notable regenerative capacity due to satellite cells that can proliferate
Clinical relevance: Disorders of lihasrakud include muscular dystrophies and myopathies, which affect strength and movement. Aging,