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Transcript 
Cell Growth &
Division
Mr. Skirbst
Cell Growth & Division
Are you bigger today
than the day you were born?
Cell Growth & Division
Are you bigger today
than the day you were born?
WHY?
Cell Growth & Division
* Cells grow in number, not in size
Cell Growth & Division
* Cells grow in number, not in size
* They do this by dividing
Cell Growth & Division
* Cells grow in number, not in size
* They do this by dividing
* Cellular division takes place over
several phases
Phases of Cellular Division
Phases of Cellular Division
1. Interphase
- chromosomes are copied
Phases of Cellular Division
1. Interphase
- chromosomes are copied
Phases of Cellular Division
1. Interphase
Phases of Cellular Division
2. Prophase
- mitosis begins (nuclear
division)
Phases of Cellular Division
2. Prophase
- mitosis begins (nuclear
division)
- spindle forms
2. Prophase
Phases of Cellular Division
2. Prophase
- mitosis begins (nuclear
division)
- spindle forms
- nuclear membrane breaks
down
Phases of Cellular Division
2. Prophase
- mitosis begins (nuclear
division)
- spindle forms
- nuclear membrane breaks
down
- chromosomes paired
2. Prophase
Phases of Cellular Division
2. Prophase
Phases of Cellular Division
3. Metaphase
- chromosomes begin
separation
Phases of Cellular Division
3. Metaphase
Phases of Cellular Division
4. Anaphase
- chromosomes separate
Phases of Cellular Division
4. Anaphase
Phases of Cellular Division
5. Telophase
- mitosis complete
- 2 new nuclei are formed
- chromosomes uncoil
Phases of Cellular Division
5. Telophase
Phases of Cellular Division
6. Cytokinesis
- two daughter cells form
- new chromosomes in each
cell
Phases of Cellular Division
6. Cytokinesis
Phases of Cellular Division
Phases of Cellular Division
Phases of Cellular Division
Where do you live?
Where do you live?
LEVELS OF ORGANIZATION
Level 1: Cells
- building blocks of all living
things
(ex. red blood cells)
LEVELS OF ORGANIZATION
Level 2: Tissues
- groups of cells working
together
(ex. muscle tissue)
LEVELS OF ORGANIZATION
Level 3: Organs
- groups of tissues working
together
(ex. lungs, heart, etc.)
LEVELS OF ORGANIZATION
Level 4: Organ Systems
- groups of organs working
together
(ex. circulatory system)
LEVELS OF ORGANIZATION
Level 5: Organism
- groups of organ systems
working together
(ex. YOU!)
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