sarcomere

Introduction

The functional unit of striated muscle. It is the segment of a myofibril between adjacent Z lines. The size & extensibility of cross-links are the main determinants of sarcomere extensibility properties of muscle. Titin provides the balance of forces between 2 halves of sarcomere at the level of individual microfilaments.

More general terms

• anatomic structure

Additional terms

• A band
• H zone
• I band
• M line
• skeletal muscle (voluntary muscle)
• Z line