The sarcomere is the smallest contractile unit of muscle.
the sacromere
A sacromere
sacromere
Sacromere
sacromere
the sacromere, contains two kinds of filaments.
sacromere
Myofibrils The sarcomere is the unit of muscular contraction.
The arrangement of actin and myosin
The sacromere with the proteins actin and myosin allow the muscle cell (fiber) to contract.
sarcomere
Binding of the myosin heads sequentially prevents the actin-binding sites on the thin filaments from becoming continuously occupied by myosin heads, allowing for the muscle fiber to relax and the sarcomere to lengthen.