the digestive system breaks down food into nutrients for the body
digestive_system has liver_and_gallbladder food is nourishment. digestive_system has mouth_and_salivary_glands mammal_digestive_tract is body_part. digestive_system is system. digestive_system has do_with_food liver has produces_bile_to_help_digest_food every_living_human_being has digestive_system digestive_tract is organ_system. digestive_tract is body_part.