The 2010 MLB trade deadline is fast approaching, and though some big deals have already been swung, rumors of several other deals remain as deadline enthusiasm nears a fever pitch. Here, SB Nation's Jeff Sullivan answers some trade deadline FAQ to get the less familiar reader up to speed on just what's going on.
After spongy bone is formed in the diaphysis, osteoclasts break down the newly formed bone to open up the medullary cavity. The cartilage in the epiphyses continues to grow so the developing bone increases in length. Later, usually after birth, secondary ossification centers form in the epiphyses.
Another difference between compact and spongy bone tissues is that while blood surrounds spongy bone tissues, it is marrow that surrounds bone in case of compact bone tissues. It is in the compact bone tissues that bone marrow is found, which is a yellow colored fluid.In brief: large portion of a bone is comprised of this compact bone tissue (nearly 80%). It is also called dense bone because of its low porosity. It is in the interior side of the bone that we find spongy or cancellous tissues. This is almost porous network of structures having shapes of rods and plates.