As used in this act, (a) "Institution" means any school or college of medicine, dentistry, pharmacy, veterinary medicine or agriculture, medical diagnostic laboratory, hospital, or other educational or scientific establishment having to do with the investigation of or instruction concerning the structure or functions of living organisms, the causes, prevention, control or cure of diseases or abnormal conditions of human beings or animals provided that high schools and elementary schools shall not be classed as institutions for the purposes of this act.
(b) "Public pound" means any place used by a city or the state for the detention or keeping of unclaimed or stray animals.