[{"Bold_text": "noun", "List Items": ["Zoology.any of various hollow organs or parts in an animal body.", "Anatomy.either of the two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries.one of a series of connecting cavities of the brain.", "either of the two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries.", "one of a series of connecting cavities of the brain."]}]