In order to introduce gas into the bladder, the gas gland excretes lactic acid and produces carbon dioxide the resulting acidity causes the hemoglobin of the blood to lose its oxygen (Root effect) which then diffuses partly into the gas bladder.
The gas gland excretes lactic acid. This is to introduce gas into the bladder. The gas gland produces carbon dioxide. This is to introduce gas into the bladder. The resulting acidity causes the hemoglobin of the blood to lose its oxygen (Root effect) carbon dioxide. This oxygen (Root effect) then diffuses partly into the gas bladder.