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.
Holoptychius-late Devonian period. The Sarcopterygii. are generally robust osteichthyan fishes with fleshy lobe-fins. They are distinguished from the Actinopterygians or ray-finned fish by their muscular fins with articulating bones.The fins are called lobe fins because they are fleshy and like the limbs of land animals, rather than the fins of familiar ray-finned fish.The lobe fins swivel on a shoulder or hip socket (like a tetrapod limb) and most of the bones can be matched directly to the bones in the limbs of land animals.oloptychius-late Devonian period. The Sarcopterygii. are generally robust osteichthyan fishes with fleshy lobe-fins. They are distinguished from the Actinopterygians or ray-finned fish by their muscular fins with articulating bones.