Transcript What are Cells? - Mona Shores Blogs

Structures and Processes
of Living Things
http://leavingbio.net/CELL%20DIVERSITY.htm
http://learn.genetics.utah.edu/content/begin/cells/scale/
Key Concepts
Cell functions, growth, and
development
 Energy transfer through photosynthesis
 Types of reproduction

Characteristics of Living Things
Grow
 Move
 Reproduce
 Get energy
 Use energy
 Get rid of waste
 Adapt to changes

Cells are Living Organisms
They grow and die.
 They need energy, nutrients, air, and
water.
 They reproduce.
 They react to what's around them.
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Key Idea #8

All living organisms are composed of
cells – from one cell to many cells.
Types of Cells
Prokaryotic Cell

does not have a nucleus
 Eukaryotic
Cell has a nucleus
(human cheek cells)
(amoeba)
(onion skin cells)
According to scientific evidence:
Organisms
include all living things
 can be uni-cellular

– a one-celled organism
– example: Protists, bacteria (monera)

can be multi-cellular
– a many-celled organism
– example: plants, fungus, animals
Amoeba (single-celled organism)
Googleimages.com
Euglena (single-celled organism)
googleimages.com
Paramecium (single-celled organism)
Elodea Leaf Cells
Single Celled Organisms in
Pond Water Video (9 min)
Multicelled Organisms in
Pond Water (3-4 minutes)
Animals and Plants are Multicelled Organisms
Plant and Animal Cells
Similarities:
 both cells have a cell membrane
 both cells have a nucleus
Differences:
 only plant cells have a cell wall
 only plant cells have chloroplasts
Cross-section of a Leaf
Cell Wall
Onion Skin
Skeletal Muscle

the muscle attached to the skeleton
White Blood Cells
Comparing Animal and Plant Cells
Onion Skin Cell
Red Blood Cells
Elodea Leaf Cell
Human Cheek Cell
Nerve Cell
White Blood Cells
Cell Facts
Cells are the simplest unit of life.
 Cells are the building blocks of life.
 All cells are produced from other
cells.
 All living organisms are made of
one or many cells.


http://cellsalive.com/
A cell is like a city

http://biology.unm.edu/ccouncil/Biology_
124/Summaries/Cell.html
The (Animal) Cell and the City
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Nucleus
Mitochondria
Ribosome
Endoplasmic
Reticulum
Golgi body
Cell Membrane
Vacuole
Cytoplasm
Lysosome

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Control Center (City Hall)
Produces energy (Power Plant)
Producer of proteins (Factory)
Transport system for proteins (Highway)
Package/distributes proteins (Post Office)
Controls what goes in/out (Customs)
Stores food/other stuff (Grocery Store)
Lawns and atmosphere
Breaks down food particles into smaller ones
(Recycle/Cleanup)
The (Plant) Cell and the City
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Nucleus
Mitochondrion
Ribosome
Endoplasmic
Reticulum
Golgi body
Cell Membrane
Vacuole

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
Control Center (City Hall)
Produces energy (Power Plant)
Producer of proteins (Factory)
Transport system for proteins (Highway)
Package/distributes proteins (Post Office)
Controls what goes in/out (Customs)
Stores food/other stuff (water
tower/warehouse)
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Cell Wall
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Chloroplasts
Cytoplasm

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Surrounds, supports, and protects the
cell. (City wall or border fence)
Uses sunlight to produce food (farm)
Lawns and atmosphere