Download Cells and Homeostasis - Mrs. Blevins` Science

Cells and Homeostasis
Smallest Unit in a Living Organism :
The Cell
Cellular Organization
Cells
Tissue
Organs
Organ System
Organisms
CellsThe Basic Building Blocks
of
All Living Organisms
All living things are made of cells. A cell is as “small as
you can get” for living organisms.
The Six Kingdoms
of Living Organisms
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The Six Kingdoms
When Linnaeus developed his system of classification, there were only two
kingdoms, Plants and Animals. But the use of the microscope led to the discovery
of new organisms and the identification of differences in cells. A two-kingdom
system was no longer useful.
Today the system of classification includes six kingdoms.
The Six Kingdoms:
Animals, Plants, Fungi, Protists, Archaebacteria, Eubacteria.
How are organism placed into their kingdoms?
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Cell type, complex or simple
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Their ability to make food
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The number of cells in their body
http://www.ric.edu/faculty/ptiskus/Six_Kingdoms/Index.htm
Eubacteria
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Archaebacteria
Protists ( Junk Drawer)
Fungi
Plants
Animal
Homeostasis
• Each cell wants to keep a balance of oxygen
food/water/temperature/stress INSIDE THE CELL AND OUTSIDE
THE CELL.
– Over watering a plant cell may cause it to blow up and burst.
– An animal cell without enough food may die.
– The temperature needs to be regulated or the cell could freeze or over heat.
• “Homeos” is like “sameness”
• A balloon with too much air will EXPLODE. Same with water in
plant.
Homeostasis in the Cell- the cell
wants an equal balance.
•Water
•Food / Nutrition
•Oxygen
•Stress
•Temperature
Tissue
• Groups of cells are called TISSUE.
• The tissue works together to do a specific
function.
• Skin Tissue covers the body to prevent
infection and disease.
Organs
• Groups of tissue make ORGANS.
• The organ has a specific job to perform.
• For example: The BRAIN is the command
central for the messages.
Organ System
• Organ systems are groups of ORGANS
working together to do a specific function.
• Ex: The Brain, Nerves, and Spinal Cord work
together to send and receive messages.
Organism
• The entire ORGANISM is the complete living
thing. Some are only one celled (bacteria) and
many are multi-celled (plants, and animals).