How might a suit of armor be a good analogy for a function of the skeleton system

If this is actually a question, a suit of armor would be a good analogy for the function of the skeletal system because they both protect you.  

Explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.