[Field observations on intestinal villi of broiler chicken with fresh specimens]

absorption digestive age animal health assorbimento digestivo chickens diagnosi di laboratorio diagnostic de laboratoire digestive absorption edad età intestin intestines intestino intestinos ispezione postmortem laboratory diagnosis membrana mucosa membrane mucose microscopia microscopie microscopy mucous membrane muqueuse necropsie polli pollo postmortem examination poulet salute degli animali sanidad animal