1. The Cell Cycle
the jazzy version

2. Why do cells divide?

3. Surface Area to volume ratio limits the maximum size of a cell
Surface area to volume ratio limits the efficiency of cell metabolism and transport mechanisms As cells grow, they have relatively less cell membrane (surface area) per unit volume for transport of substances into and out of the cell

4. When do eukaryotic cells divide?
Growth
Embryonic development
Tissue repair – e.g. cuts, burns, wounds
Do our cells go on dividing forever?
What tells a cell to divide?
Are all cells the same size?

6. The Cell Cycle
Definition: The series of events that cells go through as they grow and divide
Consists of interphase (G1, S, G2), mitosis (prophase, metaphase, anaphase, telophase) and cytokinesis
Cell cycle at speed...
or slowly, set to music

8. Mitosis
Mitosis is the type of cell division that leads to growth or repair
When a cell divides by mitosis, it produces two identical diploid daughter cells, which are clones of the parent cell

9. MITOSIS INTERPHASE is the normal lifetime of a cell, after being
“born” by division,
and before it divides
itself.
MITOSIS
INTERPHASE is not
a stage of mitosis

10. So what is the difference between MITOSIS and CELL DIVISION?
Mitosis: Division of the nucleus to form two identical nuclei
Cell division (cytokinesis) splitting of the cytoplasm, so that each of the (identical) daughter cells receives one of the nuclei and an equal number of organelles

12. Learning about mitosis
Mitosis review
Mitosis tutorial