Science / Biology / Myofibrils: Striated contractile microfilaments in skeletal muscle cells.
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
Science / Biology / Muscle Fibers: Long, multinucleated cells found in skeletal muscles; made up of myofibrils. One of the four major groups of vertebrate cell/tissue types. Muscle cells contract/relax, allowing movement of and/or with MORE