1)cause and pathogenesis lack of water(desert; sea ① intake I to drink inability(coma; baby) lung: hyperpnea(hypoxia; acidosis) skin: fever; hyperthyroidism; sweat; exposure to hot environment 2 loss t) digestive tract: vomiting; diarrhea; baby diarrhea((Nat ] 60mmol/L) kidney: diabetes(ketosis) dia betes insipidus diuretic(mannitol; hypertonic glucose)1) cause and pathogenesis lack of water(desert;sea) ① intake to drink inability(coma;baby) lung: hyperpnea(hypoxia;acidosis) skin: fever; hyperthyroidism; sweat; exposure to hot environment ② loss digestive tract: vomiting; diarrhea; baby diarrhea([Na+ ]: 60mmol/L) kidney: diabetes(ketosis); diabetes insipidus diuretic(mannitol;hypertonic glucose)