Bone metastasis may be the first sign that you have cancer, or bone metastasis may occur years after cancer treatment. Bone metastasis can cause pain and broken bones. With rare exceptions, cancer that has spread to the bones can't be cured. Treatments can help reduce pain and other symptoms of bone metastases.
Medical Definition of Chondrichthyes. : a class comprising cartilaginous fishes with well-developed jaws and including the sharks, skates, rays, chimeras, and extinct related formsâcompare cyclostomata.
Osteichthyes-Bony Fish. This is the largest class of vertebrates. There are over 29,000 species of bony fish found in freshwater and marine environments around the world. Bony fish differ from fish like sharks and rays in the chondrichthyes class.Instead of cartilage, bony fish have bones.Bony fish also have a swim bladder.ony fish differ from fish like sharks and rays in the chondrichthyes class. Instead of cartilage, bony fish have bones. Bony fish also have a swim bladder.