title: Physiological and hygiene problems involved in the study of enclosed and sealed environments.
mesh_terms: D002245:Carbon Dioxide; D018504:Ecological Systems, Closed; D005118:Extraterrestrial Environment; D006801:Humans; D010100:Oxygen; D011312:Pressure; D013026:Space Flight; D013366:Submarine Medicine; D013696:Temperature; D013997:Time Factors
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen