1. Given what you know about cells and that each cell has a nucleus containing genetic information necessary for the cell to function & the organism to survive, how does an organism go from being the size of a baby to an adult? They grow….but where do those new cells come from and how do they receive a copy of the same genetic information as the original cell? ANSWER: MITOSIS
NOTE: There are some adult stem cells that produce new cells, but these are very few.

2. What if you break your arm or get a paper cut?
Where do the bone cells come from that repair the break, or the skin cells that repair the cut?
ANSWER: MITOSIS

3. How old are you? Have you run out of cells?
Did you know…
The average lifespan of some cells in your body are:
Cell
Lifespan
Stomach lining cells
5 days
White blood cells
13 to 20 days
Red blood cells
115 days
Skin cells
2 to 3 weeks
Liver cells
10-16 months
Pancreas cells
1 year
Adult skeletal cells
10 years
Cells in lens of eye
Lifetime
You can THANK MITOSIS for not running out of cells! But before getting into the details of Mitosis, first we need to discuss the cell cycle.
How old are you? Have you run out of cells?