open-circuit breathing system

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• Open circuit — The term Open circuit may refer to: Open circuit scuba, a type of SCUBA diving equipment where the user breathes from the set and then exhales to the surroundings without recycling the exhaled air Open circuit test, a method used in electrical… …   Wikipedia

• Breathing gas — is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other artificial gases, either pure gases or mixtures of gases, are used in breathing equipment and enclosed… …   Wikipedia

• Self-contained breathing apparatus — SCBA redirects here. For other uses, see SCBA (disambiguation). Not to be confused with the very similar Self Contained Underwater Breathing Apparatus. Toronto firefighter wearing an SCBA A self contained breathing apparatus, or SCBA, sometimes… …   Wikipedia

• Primary Life Support System — A Primary (or Portable) Life Support System/Subsystem, or PLSS, is the backpack of a spacesuit. It provides most of the functions of a spacecraft life support system, in a smaller package. The functions performed by the PLSS include: *regulating… …   Wikipedia

• Diffuser (breathing set part) — A diffuser is a device fitted over an underwater breathing set s exhaust hole to break up the resulting bubbles small so they will not be seen from out of the water, and make less noise (see acoustic signature). They are used in: Combat diving… …   Wikipedia

• Trimix (breathing gas) — Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving and during the deep phase of dives carried out using technical diving techniques.cite book |title=Bennett and Elliott s physiology… …   Wikipedia

• nervous system, human — ▪ anatomy Introduction       system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …   Universalium

• Circulatory system — This article is about the organ system. For the band, see Circulatory System. For transport in plants, see Vascular tissue. Circulatory system …   Wikipedia

• Rebreather — A fully closed circuit electronic rebreather (Ambient Pressure Diving Inspiration) Acronym CCUBA (Closed Circuit Underwater Breathing Apparatus); CCR (Closed circuit rebreather), SCR (Semi closed rebreather) Uses Breathing set …   Wikipedia

• Diving regulator — and Octopus Other names Demand valve Uses Reduces pressurized breathing gas to ambient pressure and delivers it to the diver Inventor Manuel Théodore Guillaumet (1838), Benoît Rouquayrol (1860) …   Wikipedia

• Diving cylinder — Diving cylinders to be filled at a diving air compressor station …   Wikipedia