#hypoxia  a very strong drive resulting from a deficiency of available oxygen in the blood and bodily tissues (short of anoxia)
  supertype:  drive.physiological_state  a physiological state corresponding to a strong need or desire
  part of:  asphyxia
  subtype:  anemic_hypoxia  hypoxia resulting from a decreased concentration of hemoglobin
  subtype:  hypoxic_hypoxia__hypoxichypoxia  hypoxia resulting from defective oxygenation of the blood in the lungs
  subtype:  ischemic_hypoxia__stagnant_hypoxia  hypoxia resulting from slow peripheral circulation (such as follows congestive cardiac failure)
  subtype:  altitude_sickness  effects (as nosebleed or nausea) of oxygen deficiency in the blood and tissues at high altitudes
     subtype:  mountain_sickness  nausea and shortness of breath experienced by mountain climbers above ten thousand feet
  subtype:  anoxia  severe hypoxia; absence of oxygen in inspired gases or in arterial blood or in the tissues
     subtype:  anemic_anoxia  anoxia resulting from a decreased concentration of hemoglobin
     subtype:  anoxic_anoxia  anoxia resulting from defective oxygenation of the blood in the lungs
     subtype:  ischemic_anoxia__stagnant_anoxia  anoxia resulting from slow peripheral circulation (such as follows congestive cardiac failure)

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