Examlex
Describe the importance of the head in African art. How did artists among the different peoples demonstrate its significance in art?
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.
T Tubule
T Tubules, or transverse tubules, are extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells, playing a crucial role in muscle contraction.
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