Final answer:
The valves are anchored to the ventricle by cords called chordae tendineae, which are anchored to papillary muscles.
Step-by-step explanation:
The cords that anchor the valves to the ventricle are called chordae tendineae. These chordae tendineae are attached to papillary muscles in the ventricle. There are three papillary muscles in the right ventricle, known as the anterior, posterior, and septal muscles. The chordae tendineae prevent the valves from being forced into the atria and help to hold the cusps of the atrioventricular valves in place.