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

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Term
Cell Wall
Definition
the rigid,porous outerlayer of a 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 throgh the process of photosynthesis
Term
Cytoplasm
Definition
a jelly like substance, composed mainly of water, occupiyng most of the space between the cell membraneb and the nucleus.
Term
Endoplasmic Reticulum
Definition
a network of passageways in which chemical compunds 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
organells that using oxygen convert nutrients intoenergy that can be used by the cell
Term
Nuclear Envelope
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 cell 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 what leaves the cell
Term
Plastid
Definition
small stucture that can store food or pigment
Term
Ribosome
Definition
tiny structure where proteins are stored
Term
Vacuole
Definition
sac that stores water nurtients and other chemicals .The large vacuole found in plant cells helps the plants maintain shape.
Term
Vacuole
Definition
sac that stores water nurtients and other chemicals .The large vacuole found in plant cells helps the plants maintain shape.
Term
Vesicle
Definition
small package of nutrints or proteins created by the Golgi Apparatus
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