The two main tissues are bone and cartilage.
Bone is made up of collagen and calcium phosphate provides support and protection for body organs
Cartilage which is made up of closely packed collagenous fibers provides flexible support for structure such as ear, nose and trachea
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Here's an answer that might help you! I hope this helps! Like most biogeochemical cycles, human activities are capable of altering the natural conditions of the nitrogen cycle. The two activities that are primarily responsible for these alterations are the use of fossil fuels and the addition of nitrogen to fertilizers.
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