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.he bone marrow fills up the open spaces between the trabeculae. While the spongy bone tissue itself does not contain blood vessels, the surrounding marrow is full of capillaries, and helps transfer nutrients and other metabolic products from the blood to the bone tissue.