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Hallmark symptoms of ciguatera in humans include gastrointestinal, cardiovascular, and neurological effects. [5] [6] Gastrointestinal symptoms include nausea, vomiting, and diarrhea, usually followed by neurological symptoms such as headaches, muscle aches, paresthesia, numbness of extremities, mouth and lips, reversal of hot and cold sensation, [7] [8] ataxia, vertigo, and hallucinations.
A rupture disc (burst) Pressure-effect acting at a rupture disc A rupture disc, also known as a pressure safety disc, burst disc, bursting disc, or burst diaphragm, is a non-reclosing pressure relief safety device that, in most uses, protects a pressure vessel, equipment or system from overpressurization or potentially damaging vacuum conditions.
Many different conditions can lead to the feeling of dyspnea (shortness of breath). DiagnosisPro, an online medical expert system, listed 497 in October 2010. [1] The most common cardiovascular causes are acute myocardial infarction and congestive heart failure while common pulmonary causes include: chronic obstructive pulmonary disease, asthma, pneumothorax, and pneumonia.
The Pacific barracuda is found in the Northeast Pacific Ocean, typically offshore of the U.S. West Coast.While it is usually considered a pelagic species, and can could be found as far north as southern Alaska, they are most frequently found along the coast of California extending down to the southern tip of Baja California Sur, Guadalupe Island and near the mouth of the Gulf of California.
A standard fitting on single-hose second stages, both mouth-held and built into a full-face mask or demand helmet, is the purge-button, which allows the diver to manually deflect the diaphragm to open the valve and cause air to flow into the casing. This is usually used to purge the casing or full-face mask of water if it has flooded.
A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.
This form of torpedo solves the problem of high underwater drag by means of the supercavitation effect, [1] [3] where underwater at a velocity of around 180 km/h (110 mph; 97 kn) a cavity filled with steam surrounds the moving object. [3] Only the tip is in contact with the water, [3] as such the frictional resistance is greatly reduced. [3]
Once triggered, the reflex causes a strong contraction of the diaphragm followed about a quarter of a second later by closure of the epiglottis [citation needed], a structure inside of the throat, which results in the "hic" sound. Hiccups may occur individually, or they may occur in bouts.
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