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4: the shoulder joints and the hip joints.
Hip and shoulder are both Ball and Socket Joints
knee joints because they help you walk
Both joints are enarthrodial (ball and socket joints), but the hip is more stable than the shoulder. This is out of necessity because the hip must support the weight of the body, while the shoulder does not have to. The cup in the hip that the head of the femur sits in is deeper than that of the shoulder holding the head of the humerus. This means less movement for the hip, but more stability.
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The back muscles, specifically the upper and lower trapezius, are involved in the shoulder shrug. http://www.exrx.net/WeightExercises/TrapeziusUpper/DBShrug.html
You have ball and socket type of joints, in the both shoulder and hip joints.
The shoulder and hip joints.
The shoulder, elbow, and maybe to some extent even your wrist, since you have to stabilize your self with your hands.
4: the shoulder joints and the hip joints.
Hip and shoulder are both Ball and Socket Joints
a sash, a shoulder sash shawl, ruana,serape,cape or capelet,stole,shrug
The shoulder is one of the best known "ball-&-socket joints." It is a freely moveable joint.
Both the hip and shoulder joints are referred to as ball and socket joints.
Elbow Joint with the shoulder joint and wrist joint as stabilizing joints