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cell
cell sructure
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
centriole
Definition
a bundle of microtubulesthat 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 photosynthesis
Term
cytoplasm
Definition
a jelly-like substanc, 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 which chemical compounds are manufactured,processed, and transported
Term
golgi apparatus
Definition
a stack of membranes that collects,modifies,and packages chemical compounds
Term
lysosome
Definition
a small sac that contains digestive chemicals
Term
mitochondria
Definition
organelles that, using oxygen convert nutrients into enrgy that can be used by the cell
Term
nuclear envelope
Definition
a double layered membrane that surounds 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 that contains dna and directs the cells activities
Term
organelle
Definition
a cell structure that preforms 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 leaves the cell
Term
plastid
Definition
small structure that can store food or pigment
Term
ribosomes
Definition
tiny structures where protiens are synthesized
Term
vacuole
Definition
sac that stores water,nutrients, and other chemicals. the largevacuole found in plant cell helps the cell maintain shape
Term
vesicle
Definition
small package of nutrients or protiens created by the golgi apparatus
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