▪S.C.U.B.A: Self Contained Underwater Apparatus.
▪Boyle's Law states that given a constant temperature, the volume of a gas varies inversely as the absolute pressure.
▪Charle's Law states that given a constant pressure, the volume of a gas varies directly as the absolute temperature. This law is sometimes referred to as Gay-Lussac's Law.
▪Dalton's Law states that the total pressures exerted by a mixture of the pressures exerted by each of the gases.
▪Henry's Law states that the amount of gas that will dissolve in a liquid is directly proportional to the partial pressure of that gas. According to Henry's Law, at the higher pressure a diver exposes his body, the more gases it will absorb. This can cause the diver different problems based on the absorption of a high amount of a specific gas. This law explains why decompression illness happens when divers go into depths below 120 feet. In shallow depths, the diver can handle the pressure and gas absorption without many problems.
▪Air Embolism is an air bubble trapped in a blood vessel. When an air bubble travels along an artery, it moves through a system of blood vessels that gradually become narrower. At the same point, the embolus will block a small artery and cut off the blood supply to a particular area of the body.
▪Nitrogen Narcosis is an affect on the brain of gaseous nitrogen that occurs to divers who go below 100 FSW, due to the laws of partial pressures. It is the gas that causes nitrogen narcosis through the affect of Dalton and Henry's Law and it is the gas that causes decompression sickness on ascent from depth with reduction of pressure.
▪Oxygen Toxicity is a medical condition caused by exposure to oxygen at high pressures. Oxygen Toxicity is a concern for scuba divers who dive beyond recreational depths limits, use mixed gases such as enriched air nitrox, or use gases with high partial pressures of oxygen for decompression stops.