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Cells
Cell structure
14
Science
7th Grade
01/22/2010

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Term
Cell Wall
Definition
The rigid, porous outer layer of a plant cell.
Term
Vesicle
Definition
small package of nutrients or proteins created by the Golgi Apparatus
Term
Vacuole
Definition
Sac that stores water, nutrients, and other chemicals. The large vacuole found in plant cells helps the cells maintain their shape.
Term
Ribosome
Definition
Tiny stucture where proteins are synthesized.
Term
Plastid
Definition
Small structure that can store food(leucoplast) or pigment (chromoplast).
Term
Plasma Membrane
Definition
A double layered membrane that surrounds the cell. Also called the cell membrane,it regulates what enters and leaves the cell.
Term
Organelle
Definition
A cell structure that performs a a specific function.
Term
Nucleus
Definition
A round body in the center of the cell that contains DNA and directs the cell's activities.
Term
Nucleolus
Definition
A small body in the nucleus where ribosomes are synthesized.
Term
Nuclear Envelope
Definition
A double-layered membrane that surrounds and protects the nucleus.
Term
Mitochondria
Definition
Organelles that use oxygen to convert nutrients into energy that can be used by the cell.
Term
Lysosome
Definition
A small sac that contains digestive materials.
Term
Golgi Appartus
Definition
A stack of membranes that modifies, collects, and packages chemical compounds.
Term
Golgi Appartus
Definition
A stack of membranes that modifies, collects, and packages chemical compounds.
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