What are the septa? D The walls dividing the atria and the ventricles A collective term meaning all of the heart chambers The lower chambers of the heart The sounds the heart makes when it is contracting Question 47 In the term myxoma what does the combining form myx/o mean? Blue Mucus Pulse Oxygen Question 48 Which chambers of the heart are connected by the tricuspid valve? Left atrium, right ventricle Right atrium, right ventricle Right atrium, left ventricle Left atrium, left ventricle