590 Zoology 
590.1 Philosofy, classification .2 Compends .3 Dictionaries  .4 Essays, 
lectures, etc. .5 Periodicals .6 Societies «7 Study and teaching, zoologic 
gardens, aquaria, museums = .8 Collectiv works .9 History 
Physiologic zoology 
Physiology 
Circulation 
Respiration 
Nature 
Dermal 
Aquivascular 
Branchial 
Tracheal 
Pulmonary 
Exhalation of aqueous vapor 
Nutrition 
Acquisition of food 
Digestion of food 
Assimilation of food 
Growth 
Development 
Repair of waste 
Production of organic material 
Conditions of nutritiv activity 
Longevity, vitality 
Secretion and excretion 
Mucous and sebaceous 
Sericeous 
Digestiv: salivary, gastric, pancreatic 
Odoriferous, sweet, etc. 
Poisonous, gall formation, caprification 
Mammary, spermatic 
Lacrimal 
Biliary 
Urinary and fecal 
Variation See also 575.2 Evolution 
Polymorfic 
Geografic 
Heterofagic 
Polygoneutic 
Mimetic 
Sexual 
Colorational 
Hybrids 
Monstrosities 
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