What does the patella articulate with?

The patella, also known as the kneecap, is a small, flat, triangular bone that sits in front of the knee joint. It articulates with two bones: the trochlea of the femur and the tibia. The trochlea is a groove on the lower end of the femur, while the tibia is the shin bone. The patella helps to protect the knee joint from injury by providing a smooth surface for the knee to bend and straighten. It also helps to distribute the weight of the body evenly across the knee joint.