The wooded habitat of the Grey Treefrog is larger and extends farther North, while the Green Treefrogâs swamp and marsh habitat is concentrated in the South. In the area in which Gray and Green Treefrogs overlap, both habitats occur but in different places. However, natural selection does not always go to the optimum. It only goes to what works. For instance, rabbits are herbivores, which have hind gut fermentation (fermentation of food after passing through the stomach). They have a special organ called a caecum which helps them digest their food.
Years down the road, âultimately the only thing you can really do to change that situation is a total joint replacement,â said Dr. James Gladstone, an orthopedic surgeon at Mount Sinai Hospital. So Bassaragh opted for an innovative way to fix his knee: by regrowing cartilage from his own cells.
The articular cartilage (lining of the knee joint) can be damaged by either an acute injury or repetitive wear and tear. Articular cartilage has very poor potential to repair itself once it has been damaged. There are a number of surgical options available to treat areas of cartilage damage. The most commonly carried out procedure is a chondroplasty. This term covers a number of simple techniques aimed at reshaping and smoothing-off of any areas of damage to the articular cartilage. Chondroplasty involves removing loose flaps of cartilage (this can cause a sensation of catching and pain in the knee). Micro-instruments are inserted into the knee and used to take away any loose fragments of articular cartilage and stabilise the remaining tissue.