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unit 4 vocab: multicellular and unicellular organisms

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Term
Definition
unicellular   A single celled organism.  
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Multicellular   An organism made up of more than one cell.  
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Organelles   Parts inside of a unicellular organism that perform life functions.  
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Waste removal   The life function of getting rid of waste materials.  
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Respiration   In unicellular organisms, this life function is breaking down food to release energy.  
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Irritability   The life function of responding to the environment.  
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Reproduction   The life function where an organism makes more of it's own kind.  
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Growth   In unicellular organisms, this life function means replacing worn out cell parts; in multicellular organisms, it means getting larger in size.  
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Urinary system   The system in multicellular organisms that gets rid of liquid waste.  
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Endocrine system   Works with the reproductive system in multicellular organisms to perform reproduction.  
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Nervous system   The system that helps multicellular organisms react to their environment.  
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Vacuole and cell membrane   The organelles in unicellular organisms that perform waste removal.  
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Binary Fission   The method by which unicellular organisms reproduce.  
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Mitochondria   The cell organelle that performs respiration in unicellular organisms.  
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Tissues   A group of similar cells working together to perform a specific job.  
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Organs   The structure that is made up of different kinds of tissues that work together to perform a specific life function.  
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Organ systems   A group of organs that work together to perform a major life function.  
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Respiratory system   The system made up of the lungs and other organs that enable a multicellular organism to breathe.  
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Circulatory System   Works with the respiratory system to move oxygen around the body.  
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Cell division (mitosis)   The process multicellualr organisms use to add new cells when growing.  
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Created by: jstauffer
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