In the structure of a muscle, several fascicles lie bundled together to form a muscle, just as several lie together to form compact bone tissue. each muscle fiber, which is a muscle cell, consists of protein fibers. similarly, the matrix that lies outside bone cells consists of a protein fiber called .

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "