Describe the movement of bones of in a human arm.

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Solution

The movements of bones in the human arm are caused by the contraction and relaxation of muscles. One end of a muscle is attached to a movable bone, whereas the other end is attached to a fixed bone. When the muscle contracts, it pulls the movable bone. Muscles work in pairs.

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Similar questions

Which of the following bones in the human arm would correspond to the femur in the leg?

	Characteristics	Examples
(A)	Lymph filled between two bones, limited movement	Gliding joint between carpals
(B)	Fluid cartilage between two bones, limited movements	Knee joints
(C)	Fluid filled between two joints provides cushion	Skull bones
(D)	Fluid filled synovial cavity between two bones	Joint between atlas and axis

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