Because that's what they look like.
ball-and-socket joints
I think it's your elbow.
the ball and socket joint, also known as the hip joints.
If the joint between your arm and shoulder was not a ball and socket joint, you could not be able to move your arm. Ball and socket joints allow you to move in most directions. Because of this, you can move your arm up, down, side to side, front and back, and around in a circle. The ball and socket joint is one of the four major kinds of movable joints. (The four major joints are ball and socket joints, gliding joints, hinge joints, and pivotal joints in case you didn't know.)
Ball and socket joint,hinged joint,immovable joints,cartilagenous joints,semi mobile joints.
Shoulder and Hip Joints are both ball and socket joints.. :) :D xThe Shoulder joint is also called the glenohumeral joint ... and is the most freely movable joint in the human body.
A ball and socket joint allows the arms to move in a circular motion. A ball and socket joint is also called an spheroidal joint.
ball-and-socket joints
socket and ball
I think it's your elbow.
The four movable joints are- 1. Ball and Socket joint(between humerus and pectoral girdle) 2. Hinge joint(Knee joint) 3. Pivot joint(between atlas and axis) 4. Gliding joint(between carpals).The four kinds of movable joints are hinge joint, ball-and-socket joint, pivot joint ,and gliding joint.~ A. K. =)four types of movable joints are hinge joint , ball-and-socket joint , pivot joint , and gliding joint.Ball-and-socket, Hinge, Pivot, and Gliding joints.The four types of the movable joints are the ball and socket joint, hinge joint, pivot joint, and gliding joint.
the ball and socket joint, also known as the hip joints.
A ball and socket joint is a type of synovial joint. Synovial joints are the most common in the human body.
The joints in our body is Pivot joint,Hinge joint,Gliding joints and Ball-and-Socket joint.
fingers
Ball-and-socket joints allow a wider range of motion than hinge joints.
ball -and-socket joints. Of all the joints, in our bodies, these permit the widest range of movements.