Life support
The life support system is a number of systems designed to maintain a habitable environment aboard a starship or space station. Life support systems are the most crucial aboard any space vehicle. They typically include artificial gravity, and atmospheric controls.
Failure of these systems prompts a computer safeguard to order the evacuation of the starship in question. Aboard some vessels, the imminent failure of the life support system constitutes a blue alert situation.
Even when life support systems are disabled it is still possible to maintain life aboard a starship for a limited period of time using the oxygen that is already in the atmosphere. However, once the oxygen runs out any living organism that relies on oxygen will eventually suffocate.
