cancer+nootes

we have nearly 10,000,000,000,000 cells in us

-** DNA damage (radiation, smoke, chemicals) ...mmortal cell- never dies -protection from cancer ...(PCD- when cells commit suicide) - 2 genes- ...proto oncogenes- ...tumor suppressors (stop cell division) - these two genes damaged in cancer cells - proto- oncogenes- ...normally encourages cell division ...after DNA damage- oncogenes and cell division goes crazy -tumor suppressors- ...normally inhibit all division ...after DNA damage- nolonger inhibits cell division - weird cells ...ends of DNA never get shorter ...weird large nucleus multi locked ...no function except divide ...cancer cells can pile up on each other- normal cells stop dividing if they touch each other- so cancer cells make tumors
 * cancer cell-
 * - cells that are caner cells**