What is the center of sarcomere?

The center of a sarcomere is known as the M-line, which is located in the middle of the sarcomere where thick filaments (myosin) are anchored. The M-line serves as a structural support for the myosin filaments, helping to maintain the alignment of the sarcomere during muscle contraction. Surrounding the M-line are the A-bands, which contain overlapping thick and thin filaments, while the I-bands, which flank the A-bands, consist solely of thin filaments (actin). This organization is crucial for the efficient contraction and relaxation of muscle fibers.