Hinge joints are protected by cartilage and synovial fluid, a gel that assists with lubricating motion in the body. This type ...

Hinge joints ... Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens ...

The elbow and knee joints are both hinge joints. A hinge joint is a type of synovial joint that works like the hinge on a door, allowing bending and straightening only. The shoulder and hip joints ...