| Noun | 1. | muscular structure - the muscular system of an organism system - a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion" muscular tissue, muscle - animal tissue consisting predominantly of contractile cells ligament - a sheet or band of tough fibrous tissue connecting bones or cartilages or supporting muscles or organs diaphragm, midriff - (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration musculoskeletal system - the system of muscles and tendons and ligaments and bones and joints and associated tissues that move the body and maintain its form |