Examlex
A posterior infarction is usually caused by occlusion of which coronary artery?
Myoblasts
Precursor cells that can differentiate into muscle tissue during growth or the healing process.
Myofibrils
Long, filamentous organelles found in muscle cells that are crucial for muscle contraction and composed of sarcomeres.
Sarcomere
The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z lines.
Z Disk
Delicate, membranelike structure found at each end of a sarcomere to which actin myofilaments attach.
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