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Blood shift
Blood shift has at least two separate meanings:
*In medicine, it is synonymous with left shift.
*In biology, it may refer to a phenomenon that is seen when mammals submerge in water. It is part of the mammalian diving reflex. Blood vessels in the extremities contract, leaving a higher percentage of the entire blood volume in the torso. An effect that is important for freedivers is the resulting widening of the lung's capillaries. It reduces the lung's residual volume, thus increasing the depth at which the residual volume is reached (the average for untrained persons is about 30 meters, or 98.4 feet). According to Yasemin Dalkılıç, she can feel plasma enter her sinuses when diving to extreme depths while participating in free diving competitions. See also: immersion diuresis
==Free diving==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Blood shift」の詳細全文を読む
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