07BioNotes - 11:34:00 AM Most cell division has ceased by...

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12/11/2007 11:34:00 Most cell division has ceased by 18-19 years of age very few cells are actively dividing some cell division still goes on, but not muh. Iw Skin gets shed everyday.  Cells in our intestine continue to divide Cells in our lungs divide to make new lung cells Our cell divion has stopped for the most part though Genes that control micro cell division need to tell them to stop cell division When development goes wrong cancer cells do not stop divding  excess cells o or they are told to die by apoptosis and do not die, causing cancer Cancer is one of the main killers in the wetern world Infectious diseases used to kill people in early 20 th  century, but now cancer is  the number two killer.  heart attack and stroke were not as common in early 20 th  century o better hygene, water supply, etc prevents the infectious bacterial  diseases o Now, heart disease and cancer are two biggest killers o Cancer is now the biggest killer o Male Cancer death rates:  cancer is on the decline in males, except for LUNG CANCER lung cancer parallels number of people who smoke o Female cancer ate lung cancer is main killer…on the rise breast cancer and colon cancer is prevalent in women as well o Male cancer rate, 1 in 2. Female cancer rate, 1 in 3.
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