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Cells
Cell Structure
16
Science
7th Grade
01/22/2010

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Term
Cell Wall
Definition
the rigid, porous outer layer of the plant cell.
Term
Cebtriole
Definition
a bunndle of microtrotubules that help 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 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 which chemical compounds are manafactured, 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
organells that, using oxygen, convert nutrients into energy that can be used by a 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 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 performs a specific function.
Term
Plasme 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 (leucoplast) or pigment (chromoplast)
Term
Ribosome
Definition
tiny structure where protiens are synthesized.
Term
Ribosome
Definition
tiny structure where protiens are synthesized.
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