The Capitate
helmet = skull cage = ribs (as in "rib cage")
Wear a full-face helmet.
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Bone marrow.
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Spongy bone looks like what a sponge looks like. It has many openings and a thin covering of hard bone over it.
Compact bone looks pretty much solid and spongy bone looks more like the back of a wicker chair. The lattice-like appearance is called trabeculae and makes the bone lighter and has space for the bone marrow.
Helmet sits higher off the head. Helmet also extends to cover the mandible bone on players jaw.
Bone in Japanese kanji looks like this. Bone: 骨 Bone in Japanese is pronounced like this. Honei
It looks like sponge but it's the calcium in your bone
Spongy bone looks something like a sloppily made honeycomb covered with an outer layer of solid compact bone. The spaces in the spongy bone are filled with red bone marrow and blood vessels.
codi