Sarcomeres

Science / Biology / Sarcomeres: The functional units of skeletal muscle; consist of filaments of myosin and actin.

Actin

Science / Biology / Actin: The protein from which microfilaments are composed; forms the contractile filaments of sarcomeres in muscle cells. MORE

Myosin

Science / Biology / Myosin: Thick protein filaments in the center sections of sarcomeres. MORE

Z Lines

Science / Biology / Z Lines: Dense areas in myofibrils that mark the beginning of the sarcomeres. The actin filaments of the sarcomeres are anchored in the Z lines. MORE

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