Warm up # 13Give 1 example of a Multi-

cellular organismGive 1 example of a Multi-

cellular organism

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CELDT Practice

• Do you prefer to watch TV or playVideogames/computer games?

Please answer in complete sentence

• Do you prefer to watch TV or playVideogames/computer games?

Please answer in complete sentence

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Table of ContentsAssignments page

7. Characteristics of Life Page __8. Levels of organization Page __

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What is Levels of Organization?

• Levels of organization helps withunderstanding how large a cell is.

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With your partners, list these wordsfrom smallest to largest. Use a pencil!

• 1.• 2.• 3.• 4.• 5.• 6.• 7.• 8.

• Organelles• Tissue• Cells• Organ system• Atoms• Molecules• Organism• Organ

• 1.• 2.• 3.• 4.• 5.• 6.• 7.• 8.

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• Organelles• Tissue• Cells• Organ system• Atoms• Molecules• Organism• Organ

Levels of Organization

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1. Atoms

• the basic unit of a chemical element.

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2. Molecules2. Molecules• Groups of atoms; smallest unit of most

chemical compounds–Example: Water & DNA

Organelles

• Groups of molecules make up organelles

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3. Cell: the smallest unit of life that isconsidered a living thing

4. Tissue: a group of cells that worktogether and perform a function.

5. Organ: a group of similar tissues thatwork together to perform a function.

Some human organs are: heart,lungs, brain, stomach, andmuscles.

6. Organ System: one or more organs thatwork together and perform one or morefunctions.

Some human organ systems are: skeletal system, muscular system,nervous system, cardiovascular system, digestive system, and therespiratory system

7. Organism: the most complex living thing.Organisms contain many organ systems that each have theirown function, but depend on each other to help theorganism function.

-All levels of organization need to function in order for theorganism to be alive and healthy.

- If one level of the levels of organization fails, theorganism would not function properly and would die.

Smallest to largest

• 1. Atoms• 2. Molecules• 3. Organelles• 4. Cells• 5. Tissue• 6. Organ• 7. Organ system• 8. Organism

• 1. Atoms• 2. Molecules• 3. Organelles• 4. Cells• 5. Tissue• 6. Organ• 7. Organ system• 8. Organism

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