The oxygen carrying capacity is at its maximum when reptiles are within their [[Preferred optimum temperature zone|POTZ]]. This has obvious implications for husbandry practices. The haemoglobin molecule is responsible for oxygen uptake. | The oxygen carrying capacity is at its maximum when reptiles are within their [[Preferred optimum temperature zone|POTZ]]. This has obvious implications for husbandry practices. The haemoglobin molecule is responsible for oxygen uptake. |