Completar Frases Thoracic cageVersión en línea Identify the bones that form the thoracic cage. Boxes that require multiple answers are in alphabetical order. por Kristani Cochran 1 12 process thoracic 1 body cage manubrium floating 10 false 8 costal 11 xiphoid middle 7 superior cartilage ribs 7th sternum inferior true The is composed of quite a few parts . First is the , which is an elongated flat bone forming the middle part of the anterior thoracic wall . It is composed of three parts , the ( which is the portion ) , ( the portion ) , and ( the portion ) . The are also a part of this cage , - attach anteriorly to the sternum through strips of and are known as ribs . - are ribs that only attach to the cartilage . - do not attach to anything are known as ribs .