The patella, commonly known as the kneecap, is a small, flat bone located at the front of the knee joint. It serves to protect the knee and improve the leverage of the thigh muscles during movement. The patella is a sesamoid bone, meaning it is embedded within a tendon, specifically the quadriceps tendon. The patella plays a crucial role in the biomechanics of the knee, allowing for smooth movement and stability. It articulates with the femur and helps in the extension of the leg. Injuries or conditions affecting the patella, such as patellar tendinitis or dislocation, can lead to pain and impaired mobility.