Do frogs have a rib cage?

The frog’s rib cage is absent. The thing is, they don’t have ribs. Therefore, the mechanism of air flow into the lungs is different from that of other tetrapods (in which it is of the suction type). In frogs, this mechanism is forcing: first, air is drawn through the nostrils into the oropharyngeal cavity, and then the nostrils are closed, and by raising the bottom of the oropharynx, air is pushed into the lungs. Well, he comes out back because of the pressure of the abdominal muscles. Pulmonary respiration in most amphibians is supplemented by cutaneous respiration.