Final answer:
The term 'atrioventricular' describes something pertaining to both the atrium and the ventricle, such as the atrioventricular valves that control blood flow between these heart chambers.
Step-by-step explanation:
The medical term that means pertaining to both the atrium and the ventricle is atrioventricular. This term is often used in context with the atrioventricular valves, which include the tricuspid valve on the right side of the heart and the bicuspid or mitral valve on the left side. These valves are one-way membranous flaps of connective tissue that regulate blood flow between the atria and the ventricles during the cardiac cycle.
The atrium (plural: atria) is the upper chamber of the heart that receives blood from the veins and pumps it into the ventricles. The ventricles are the large chambers of the heart that pump blood into arteries. Proper function of the atrioventricular valves ensures that during systole, or contraction of the ventricles, blood is efficiently pumped into the arteries without backflow into the atria.