These flared ends, or epiphyses bookend the bone's shaft, or diaphysis, which — instead of having spongy bone in the center — surrounds a hollow medullary cavity that's full of that yellow marrow.

这些张开的末端，或称骨骺，骨干，或骨干，骨干的中心不海绵状骨，而一个充满黄色骨髓的空心髓腔。