Explain Joints with one degree of freedom.

Joints with one degree of freedom are those that allow movement in only one plane or axis. These joints are also known as hinge joints and are designed to allow movement like a door hinge. The most common example of a joint with one degree of freedom is the elbow joint, which allows for movement in only one direction - flexion and extension. Other examples of joints with one degree of freedom include the knee joint and the ankle joint. These joints are essential for movement and play a significant role in our daily activities such as walking, running, and jumping.