Biology Terms and Systems

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Organelle

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A specialized subunit within a cell that has a specific function.

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Cell

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The basic structural, functional, and biological unit of all living organisms.

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Tissue

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A group of cells that work together to perform a specific function.

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Organ

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A part of the body that performs a specific function, made up of different tissues.

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Organ System

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A group of organs that work together to perform complex functions.

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Nucleus

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The control center of a cell, containing DNA.

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Chloroplast

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An organelle found in plant cells where photosynthesis occurs.

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Cytoplasm

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The jelly-like substance within a cell, excluding the nucleus.

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Cell Wall

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A rigid layer that gives protection and structure to plant cells.

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Mitochondria

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The powerhouse of the cell, where energy production occurs.