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Kyork
cells
20
Science
9th Grade
01/22/2010

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Term
cell wall
Definition
the rigid, porous outer layer of a plant cell
Term
centriole
Definition
a bundle of micretubes that help oragnize the movement if chromosomes during cell division
Term
chloroplast
Definition
an organelle that converts the radiant energy of the sun into chemical energy through the process of photosynthesis
Term
cytoplasm
Definition
a jelly-like substance composed mainly of water, occupying most of the space between the cell membrane and the nucleus
Term
endoplasmic reticulum
Definition
a network of passageways in wich chemicals compounds are manufactured,processed, and transported
Term
golgi appartus
Definition
a stack of membrane that collects, modifies, and packages chemical compounds
Term
lysosome
Definition
a small sac that contains digestive chamicals
Term
mitochondria
Definition
organells that, using oxygen, convert nutrients into energy that can be used by the cell
Term
nuclear envelope
Definition
a doubly-layerd membrane that surrounds and protects the nucleus
Term
nucleolus
Definition
a small body in the nucleus where ribosomes are synthesized
Term
nucleus
Definition
a round body in the center of the cell containing DNA and directs the cell's activities
Term
organelle
Definition
a cell structure that contains a specific function
Term
plasma membrane
Definition
a double-layerd membrane that surrounds the cell. also called the cell membrane, it regulates what enters and leaves the cell.
Term
plasma membrane
Definition
a double-layerd membrane that surrounds the cell. also called the cell membrane, it regulates what enters and leaves the cell.
Term
plastid
Definition
small structure that can store food (leucoplast) or pigmennt (chromosomes)
Term
plastid
Definition
small structure that can store food (leucoplast) or pigmennt (chromoplast)
Term
ribosomes
Definition
tiny structures where proteins are synthesized
Term
vacuole
Definition
sac that stores water nutrients and other chamicals. the larg vacuole found in plant cells help the cells maintain their shape
Term
vesicle
Definition
small package of nutrients or proteins created be the golgi apparatus
Term
vesicle
Definition
small package of nutrients or proteins created be the golgi apparatus
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