The diaphragm is located in the rib cage below the lungs. Hiccups' are a spasm of the diaphragm. Internal intercostals lift the ribs during respiration, whilst external intercostals draw the ribs together during expiration to lessen the volume of the rib cage and thoracic cavity to push air out of the lungs. Tendons connect muscles to the bone, these are formed from the connective tissue that cover the muscle. They are dense white cords of tissue which are strong and flexible, they serve to anchor muscles to the bone.
Most movements involve several skeletal muscles working together.
Most skeletal muscles are arranged in opposing pairs at joints, for example one muscle tightens up while the other extends. Rhabdomyosarcoma accounts for about two thirds of childhood soft tissue sarcomas. Alveolar rhabdomyosarcoma is most common in adolescents and young adults, mostly found in peripheral muscles. Pleomorphic rhabdomyosarcoma is most common in adults, usually found in the muscles of the extremities in adults. Internet Resources for Soft Tissue Sarcoma Potential Side Effects of Radiotherapy on Muscles Muscles can be damaged by radiotherapy which can cause fibrosis, muscle shortening and atrophy.