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The differences between plant and
animal cells
• Chromosomes are copied (# doubles)• All organelles and cytoplasm double• Chromosomes appear as long thin threadlike
coils (chromatin)
Cell MembraneNucleus
Cytoplasm
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• Centrioles (or poles) appear • Spindle fibers form near centrioles.• Centromeres appear, hold chromosomes together
• Nuclear membrane begins to disappear
CentriolesChromosomes
Spindle fibersCentromere
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
• Chromosomes attach to the spindle fibers.
• Chromosomes line up in center of cell
Centrioles
Spindle fibers
ChromosomesCentromere
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• Centrioles tug on spindle fibers• Chromosomes separate and begin to
move to opposite ends of the cell. • Centromeres disappear
Centrioles
Spindle fibers
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
• Two new nuclei form. • Spindle fibers and centrioles disappear.• Mitosis ends.
Nuclear membraneNuclear membrane
ChromosomesChromosomes
Cytoplasm Divides•Animal Cell - Cell membrane moves inward •Plant Cell – Cell plate moves outward
Animal Plant
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Animal Cell Division- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Plant Cell Division- ReviewInterphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Three reasons why cells Three reasons why cells reproduce asexually:reproduce asexually:
GGrowth- rowth- needed so organisms can needed so organisms can developdevelop
RRepair- epair- injured tissuesinjured tissues
RReplace – eplace – worn out cells worn out cells
What type of cells never What type of cells never leave interphase?leave interphase?
MuscleMuscle NerveNerve
Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
How does it develop??
Cells that reproduce by asexual reproduction reproduce constantly.
19
20
- Cell Division
20
http://www.cellsalive.com/mitosis.htm
How do little elephants grow up to be BIG elephants?
The process of asexual reproduction begins
after a sperm fertilizes an egg.
Animated Mitosis Cyclehttp://www.cellsalive.com/mitosis.htm
• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase
• Cytokinesis