How do the muscles and bones work together to flex the knee

How do the muscles and bones work together to flex the knee

Has to be Harvard referenced

Discuss what type of joint the knee is.

Discuss muscle contraction of the hamstring muscle group.

Discuss how flexion is achieved.

Discuss the role of tendons in the process.

If you have enough words, you can also include a brief discussion of the overall process of muscle contraction.