EVERYDAY SCIENCE

Detailed explanation-1: -The ulna helps to protect the elbow joint and the nerves running through the elbow to the forearm and hands. The patella helps to protect the knee joint, the ends of the tibia and femur that form the joint, and the nerves running through the knee to the lower leg.

Detailed explanation-2: -Additionally, the patella protects the quadriceps tendon from frictional forces by minimizing tendon contact with the femur and acts as a bony shield for deeper structures in the knee joint.

Detailed explanation-3: -The patella plays the following role at the knee joint: Functions primarily as an anatomic pulley for the quadriceps muscle.It increases the lever arm of the extensor mechanism allowing for more effective knee flexion and thus increase quadriceps strength by 33–50%.

Detailed explanation-4: -The patella is a small bone located in front of the knee joint-where the thighbone (femur) and shinbone (tibia) meet.

Detailed explanation-5: -The patella (kneecap), attached to the quadriceps tendon above and the patellar ligament below, rests against the anterior articular surface of the lower end of the femur and protects the knee joint. The patella acts as a fulcrum for the quadriceps by holding the quadriceps tendon off the lower end of the femur.