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cells
cell structure
18
Science
7th Grade
01/22/2010

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Term
cell wall
Definition
the rigid,porous outer layer of the plant cell.
Term
centriole
Definition
a bundle of microtubes that helps organize the movement of chromosomes during cell division
Term
chloroplast
Definition
an organelle that converts the radiant energy of the sun into chemical energy through the process of photosynthisis
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 networkof passageways in which chemical compounds are manufactured, processed and transported.
Term
golgi aparatus
Definition
a stack of membranes that collects , modifies, and packages chemicals compounds.
Term
lysosome
Definition
a small sac that contains digestive chemicals
Term
mitochondria
Definition
organelles that using oxygen converts 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 where ribosomes were synthizized
Term
nucleus
Definition
a round body in the center of the cell that contains dna and directs the cells activities
Term
organelle
Definition
a cell structure that performs a specific function
Term
plasma membrane
Definition
a double layered membrane that surrounds the cell.also called the cell membrane it regulates what enters and what leaves the cell
Term
plastid
Definition
small structure that can can store food or pigment
Term
plastid
Definition
small structure that can can store food or pigment
Term
ribosomes
Definition
tiny structures were proteins are synthizised
Term
vacuole
Definition
sac that stores water nutrient and other chemicals. the large vacuole found in plant cells maintains there shape
Term
vesicle
Definition
small packages of nutrients or proteins created by golgi aparatus
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