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J Ankrum
Cell Structure
17
Science
7th Grade
01/22/2010

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Term
cell wall
Definition
the rigid, porous outer layer of a plant cell
Term
Centrole
Definition
a bundle of microtubules that help organize the movement of chromosomes during cell division
Term
Chloroplast
Definition
An organelle that converts the radiant energy throught the process of photosynthesis
Term
Cytoplasm
Definition
A jelly-like substance,composed mainly of water, occupying most of the space between th cell membrane and the nucleus
Term
Endoplasmic reticulum (ER)
Definition
a network of passageways in which chemical compounds are manufactured , processed, and transported
Term
Goligi Body
Definition
A stack of membranes that collects modifies and packages chemical compunds
Term
Lysosomes
Definition
a small sac that contains digestive chemicals
Term
Mitocondria
Definition
organells that, use oxygen, convert nutrients into energy that can be used by the cell
Term
nuclear envolope
Definition
a double layered membrane that surrounds and protects the nucleus
Term
nucleolus
Definition
a small body in the nucleus were ribosomes are synthesized
Term
nucleus
Definition
a round body in the center of the cell that contains DNA and directs the cell's activitys
Term
organelle
Definition
a cell structure that can preform a specific function
Term
plasma membrane
Definition
a double layered membrane the surrounds the cell.regulates what enters and leaves the cell
Term
plastid
Definition
smalll structure that can store food or pigment
Term
ribosome
Definition
tinystructure where protiens are synthesized
Term
vacuole
Definition
sac that stores water,nutrients, and other chemicals. the large vacuole found in the plant cell helps the cell maintain its shape
Term
vesicle
Definition
small package of nutrients or protiens creapted by the golgi body
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