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cells
cell structure
13
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 microtubules that helps organize the movement of chromosomes during mitosis
Term
chloroplast
Definition
an organelle that converts the radiant energy of the sun into chemical energy through photosynthesis
Term
cytoplasm
Definition
a jelly like substance,composed mainly of water occupying most of the area between the membrane and the nucleus
Term
endoplasmic reticulum (e.r)
Definition
a network of passageways in which chemical compounds are manufactured,processed and transported
Term
golgi apparatus or golgi body
Definition
a stack of membranes that collects, modifies,and packages chemical compounds
Term
lysosome
Definition
a small sac of membranes that contains digestive chemicals
Term
mitochondrion (pl.mitochondria)
Definition
the powerhouse: organelles that, using oxygen,convert energy that can be used by the cell
Term
nuclear envelope (membrane)
Definition
a double layered membranethat surrounds and protects the nucleus
Term
nucleolus
Definition
a small body in the nucleus where ribosomes are made
Term
nucleus
Definition
around body in the center of the cell that contains DNA and directs the cells activities
Term
organelle
Definition
a cell structure in the that performs a specific funcion
Term
plasma membrane
Definition
a double layered membrane that surrounds the cell.
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