“knacker’s yard” means any premises used in connection with the business of slaughtering, flaying or cutting up animals the flesh of which is not intended for human consumption; and “knacker” means a person whose business it is to carry out such slaughtering, flaying or cutting up

“slaughterhouse” means a place for slaughtering animals, the flesh of which is intended for human consumption, and includes any place available in connection with such a place for the confinement of animals while awaiting slaughter there or keeping, or subjecting to any treatment or process, products of the slaughtering of animals there; and “slaughterman” means a person whose business it is to carry out such slaughtering