Final answer:
The tricuspid valve is surrounded by the other three heart valves in a transverse section through the heart.
Step-by-step explanation:
In a section through the heart along the plane of its four valves, the tricuspid valve is surrounded by the other three. This configuration is seen in a transverse section slightly above the level of the atrioventricular septum. The tricuspid valve, also known as the right atrioventricular valve, is between the right atrium and the right ventricle and typically has three flaps or leaflets made of endocardium reinforced with additional connective tissue.