CBSE Class 6 Answered
(i) What is a pivotal joint? Give one example.(ii) What is the role of a rib cage?
Asked by Topperlearning User | 16 Jun, 2016, 02:05: PM
Expert Answer
(i) It is a joint which shows movement in the form of rotation. In a pivotal joint, a cylindrical bone rotates in a ring. Example- this joint helps the head to rotate on the neck.
(ii) The chest bones (ribs) and the backbone are joined together to form a box called the rib cage. This cage provides protection to some internal organs of our body like heart, lungs and liver.
Answered by | 16 Jun, 2016, 04:05: PM
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