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.
First, some background on the field... About ten years ago, doctors in Sweden began to surgically remove samples of healthy articular cartilage from the knees of patients with cartilage defects and use it to grow new cartilage in tissue culture.