The central nervous system of reptiles is less sensitive than mammals to a drop in oxygen tension and they are capable of holding their breaths for long periods of time. Inhalation methods are therefore not considered a practicable or humane method of euthanasia. | The central nervous system of reptiles is less sensitive than mammals to a drop in oxygen tension and they are capable of holding their breaths for long periods of time. Inhalation methods are therefore not considered a practicable or humane method of euthanasia. |