• Axial Skeleton,: A division of the skeleton consisting of the skull, thoraz and vertebral column
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• Appendicular Skeleton,: A division of the skeleton composed of the girdle and limb bones
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• Oviparous,: These organisms lay eggs that develop and hatch outside the mother.
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• Viviporous,: These organisms nourish their offspring inside the mother during development and give birth to live young.
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• Ovoviviparous,: These organisms carry their young in eggs inside the mother, when the eggs hatch, the mother gives birth to live young.