A sarcomere is best described as
A sarcomere is best described asa unit within a myofibril. It is a  basic unit of a muscle. It comes from the Greek word sarx which  means flesh and meros which means pa â¦ rt.he boundary of the sarcomere are the Z lines. Thin filaments extend from the Z li â¦ nes and overlap with thick filaments in the middle of the sarcomere.