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.
Spongy bone is lighter, softer, and weaker than compact or cortical bone, the other type of calcium tissue, but it has a greater surface area and is much more vascular, or supplied with blood vessels. Spongy bone is found on the inside of some bones, and it is surrounded by the stronger, more protective compact bone. diagram of the anatomy of a bone, showing the spongy bone. In adults, most red bone marrow can be found in spongy bone. Spongy bone is also called cancellous bone, which makes up a larger portion of the bone than the external compact bone tissue.