the digestive system digests food for the body
digestive_system has mouth_and_salivary_glands mammal_digestive_tract is body_part. digestive_system is system. digestive_system has esophagus_and_stomach all_animals has digestive_system digestive_system has liver_and_gallbladder digestive_tract is organ_system. digestive_tract is body_part. every_living_human_being has digestive_system digestive_system has do_with_food