Skeleton is therefore, the hard framework on which the body is built. This hard framework may be made up of sand particles as in Arcellar (a shelled Amoeba), exoskeleton as in insects and snails, cartilage as in the cartilaginous fish, bones and less cartilage in the bony fish and other vertebrates.   Functions of the skeleton Protection: It gives protection to the delicate organs of the body. For example, the skull protects the brain, eyes and ears. The thoracic bones protect the heart and lungs. The vertebral column protects the spinal cord. Support: The rigid framework of the skeleton gives support to the body. The cervical vertebrate support the head…

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