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Structure and Function of Cells
Organelle – “little organ” these are the structures found in cells that carry out the activities of life within the cell
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Cell Membrane Outer boundary of cell Protects the cell
Controls what enters and leaves the cell Also called – plasma membrane Is semi-permeable
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Cell Wall Only found in plant cells Adds protection and support
Made of cellulose. Allows water and dissolved substances to pass through.
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The Nucleus Controls most activities in the cell
Contains all genetic information in the form of DNA.
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Nucleolus Contained in the nucleus and is responsible for producing ribosomes. Nucleolus
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Chromatin DNA – Inside the nucleus and contains the blueprint or genes of the organism. Nucleus
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Cytoplasm Clear fluid within cell that contains all organelles
Moves materials throughout the cell
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Endoplasmic Reticulum
Series of folded membranes that form sacs or tubes Rough ER has ribosomes attached Transports chemicals between cells and within cells provides a large surface area for the organization of chemical - reactions and synthesis
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Ribosomes Transports materials between the cytoplasm and nucleus
Makes proteins in the cell May be free in cytoplasm or attached to ER Proteins are vital to life- all cells must produce them
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Golgi Bodies Saclike membranes used for storing/ packaging of chemicals Cells that make saliva or mucus have many Golgi bodies
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Mitochondria Energy producers Powerhouse of the cell Oval-shaped
Many mitochondria in muscle cells
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Chloroplast Only found in plants/ algae Contain food or pigments
Chloroplasts contain the pigment chlorophyll This is where photosynthesis happens!!
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Vacuoles Store food, water, or waste materials
Plant cells have large vacuoles – to store water Animal cells have small vacuoles
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