#drive.physiological_state  a physiological state corresponding to a strong need or desire
  supertype:  physiological_state__physiologicalstate__physiological_condition__physiologicalcondition  the condition of the body or bodily functions
  subtype:  hungriness__hunger  a physiological need for food
     subtype:  bulimia  pathologically insatiable hunger (especially when caused by brain lesions)
     subtype:  emptiness.hungriness__emptines  having an empty stomach
     subtype:  edacity__esurience__ravenousnes__voracity__voraciousness__voraciousnes  excessive desire to eat
     subtype:  starvation__famishment  a state of extreme hunger resulting from lack of essential nutrients over a prolonged period
     subtype:  undernourishment__malnourishment  not having enough food to develop or function formally
  subtype:  thirst  a physiological need to drink
     subtype:  dehydration  depletion of bodily fluids
     subtype:  polydipsia  excessive thirst (as in cases of diabetes or kidney dysfunction)
  subtype:  sex_drive__sexdrive  a physiological need for sexual activity; "testosterone is responsible for the male sex drive"
  subtype:  hypoxia  a very strong drive resulting from a deficiency of available oxygen in the blood and bodily tissues (short of anoxia)
     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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