If risen bread is desired, one must leaven the dough, either by mixing it with a piece of already leavened dough or leaving it exposed to yeast spores in the air for a period ranging from a single day to several, depending on the ambient conditions.
Medical Definition of RIB CAGE. : the bony enclosing wall of the chest consisting chiefly of the ribs and the structures connecting themâcalled also thoracic cage.ull Definition of RIB CAGE. : the bony enclosing wall of the chest consisting chiefly of the ribs and the structures connecting them. See rib cage defined for English-language learners.
Credit: Rega Photography CC-BY-SA 2.0. The rib cage is one of the strongest structures in the human body, designed to protect two of the most important organ systems: the heart and lungs. It consists of 24 rib bones, along with the sternum, 12 thoracic vertebrae and costal cartilages. The top rib bones are thin, curved bones that connect to the sternum.