Cancer cells act differently to regular cells in the body. These differences are related to cell divisional behavior. For example, cancer cell(s) can multiply and grow outside the body. Regular cells can only grow inside the body. Cancer cells can trick neighboring cells into making growth factors that sustain their life. I hope this answers your question, If not, here's a link:
https://www.khanacademy.org/science/biology/cellular-molecular-biology/stem-cells-and-cancer/a/cance... (to view it, right click and press view on new tab, that's the way it will work!) I hope I helped.
When a red blood cell is placed in water, the water molecules will enter the cell rapidly as a result of osmosis. Osmosis is the process by which molecules moves through a cell permeable membrane from the region of lower concentration to that of higher concentration.
The inside of the red blood cell is more concentrated than the water in which it is placed, so water will move into the cell via osmosis.
This will make the cell to swell up and to burst open.<span />
It is a sphere to be precise.
Because of the omnidirectional nature of the gravitational attraction, mass tends to form spheres in the macro scale of planets and similarly massive celestial bodies.
