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Cells
Parts of a Cell
18
Science
7th Grade
12/05/2010

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Term
Scientists separate cells into 2 major categories:
Definition
the eukaryotic cell and the prokaryotic cell.
Term
What are prokaryotic cells?
Definition
Most prokaryotic cells are unicellular (single-celled organisms like bacteria).
Term
What are eukaryotic cells?
Definition
Most eukaryotic cells are multicellular (many-celled organisms like plant and animal cells).
Term
Cell Membrane
Definition
Both animal and plant cells are surrounded by a protective covering that encloses the entire cell called the cell membrane. The cell membrane is semi-permeable which means that it will allow certain materials into the cell and will keep other materials out (kind of like the fence surrounding the factory).
Term
Cytoplasm
Definition
Contained inside the cell membrane is a jelly-like substance called cytoplasm which holds all the other parts of the cell.
Term
Nucleus
Definition
The nucleus is the central command center that contains the genetic information for the cell (kind of like the boss in the factory).
Term
Ribosomes
Definition
Ribosomes are parts of the cell that produce proteins (kind of like the workers in the factory).
Term
Endoplasmic Reticulum
Definition
Moves the proteins (produced by the ribosomes) to the Golgi apparatus (kind of like the conveyer belt tht moves the product to the packaging department).
Term
Golgi Apparatus
Definition
Packaging department for the proteins produced by the ribosomes (kind of like the packaging department that gets the product (protein) ready to be shipped out).
Term
Vesicles
Definition
The vesicles transport these proteins to other parts of the cell (kind of like the delivery truck in a factory).
Term
Lysosomes
Definition
The lysosomes act as the cleanup crew (in an animal cell) because they digest old, worn out parts of the cell (kind of like the janitor of the factory).
Term
Mitochondria
Definition
Produces energy (kind of like the generator of the factory).
Term
Chloroplast
Definition
The chloroplasts use energy from the sun to make food (sugar) for the plant in the process called photosynthesis (kind of like the solar energy source for the factory...uses the sun).
Term
Central Vacuole
Definition
The central vacuole holds water, waste and other materials for the plant and acts like a huge storage tank (kind of like the storage tank in the factory).
Term
Cytoplasm
Definition
Contained inside the cell membrane is a jelly-like substance called cytoplasm which holds all the other parts of the cell (kind of like the air in the factory that surrounds everything else).
Term
Cell Wall
Definition
The cell wall is a tough, outer covering that lies just outside the cell membrane and gives the plant extra support (kind of like an exta security fence around the factory).
Term
Protein
Definition
It is produced by the ribosomes (kind of like the product produced in the factory).
Term
Which 3 parts are found in plant cells only?
Definition
Cell Wall, Chloroplasts, and Central Vacuole
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