The answer is; cancer occurs due to unregulated cell division
This causes them to proliferate causing a mass of cells and affect neighboring tissues. The cells are usually undifferentiated and therefore do not function properly as tissue. This unregulated division is due to malfunction of the tumor suppressor gene that is significant in cell cycle regulation and apoptosis.
Osteocytes maintain contact with neighboring osteocytes in adjacent lamellae via dendrite-like extensions through the canaliculi. It is small duct where the processes of osteocytes happens. These channels are located in an ossified bone. It function as the path for nutrients to the osteocytes and to expel wastes.
Phototropism is one of the many plant tropisms or movements which respond to external stimuli. Growth towards a light source is called positive phototropism, while growth away from light is called negative phototropism (skototropism).