…showed first 75 words of 841 total…

…showed last 75 words of 841 total…the, mouths bottom is raised then external nares close, the glottis is opened and last the body wall is relaxed. The third stage is where air leaves the lungs, then the mouth lowers, external nares close, the, glottis is open, and last the body wall contracts. The last stage is when air leaves the mouth and it ends with the body wall being relaxed. (Bohensky, F. 1987) This concludes my study on gas-exchange in the frog.