Question

why does the rib cage have joints? why are they immovable?​

Answer 1

Explanation:

Immovable joints allow no movement because the bones at these joints are held securely together by dense collagen. The bones of the skull are connected by immovable joints. ... Bones at these joints are held in place by cartilage. The ribs and sternum are connected by partly movable joints.

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Answer 2

It has joints to balance the body.Meaning to give the body a proper shape.If they were movable our body will be like a jiggly jelly