The term "trochlea" refers to a structure in the body that resembles a pulley. It is commonly found in the anatomy of joints, particularly in the humerus, where it helps facilitate movement. The trochlea allows for smooth articulation between bones, enabling actions such as bending and straightening. In addition to the humerus, the trochlea is also present in the ankle joint, where it plays a crucial role in the movement of the talus bone. This pulley-like structure ensures that the bones move efficiently and maintain stability during various physical activities.