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Diving Disorders
Diving disorders, or diving related medical conditions, are conditions associated with underwater diving, and include both conditions unique to underwater diving, and those that also occur during other activities. This second group further divides into conditions caused by exposure to ambient pressures significantly different from surface atmospheric pressure, and a range of conditions caused by general environment and equipment associated with diving activities. Disorders particularly associated with diving include those caused by variations in ambient pressure, such as barotraumas of descent and ascent, decompression sickness and those caused by exposure to elevated ambient pressure, such as some types of gas toxicity. There are also non-dysbaric disorders associated with diving, which include the effects of the aquatic environment, such as drowning, which also are common to other water users, and disorders caused by the equipment or associated factors, such as carbon dioxide a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mask Squeeze
A mask is an object normally worn on the face, typically for protection, disguise, performance, or entertainment and often they have been employed for rituals and rights. Masks have been used since antiquity for both ceremonial and practical purposes, as well as in the performing arts and for entertainment. They are usually worn on the face, although they may also be positioned for effect elsewhere on the wearer's body. More generally in art history, especially sculpture, "mask" is the term for a face without a body that is not modelled in the round (which would make it a "head"), but for example appears in low relief. Etymology The word "mask" appeared in English in the 1530s, from Middle French ''masque'' "covering to hide or guard the face", derived in turn from Italian ''maschera'', from Medieval Latin ''masca'' "mask, specter, nightmare". This word is of uncertain origin, perhaps from Arabic ''maskharah'' مَسْخَرَۃٌ "buffoon", from the verb ''sakhira'' "t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
