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habusaad
cells
19
Science
7th Grade
01/22/2010

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Term
Cell Wall
Definition
the rigid,porour outer layer of a plant cell.
Term
Centriole
Definition
a bundle of microtubules that help organize the movement of chromosomes during cell division
Term
Chloroplast
Definition
an organelle that contverts 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 occuping 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 Apparatus (Golgi Body)
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 nutritions 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 are synthesized
Term
Nucleus
Definition
a round body int the center of the cell that contains DNA and directs the cells activity
Term
Organelle
Definition
a cell structure that preformes 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(leucoplast) or pigment(chromoplast)
Term
Ribosomes
Definition
tiny structure where proteins are synthesized
Term
Vacuole
Definition
sac that stores water nutriens and other chemicals. the large vacuole found in a plant cells helps the cells maintain there shape
Term
Vesical
Definition
small package of nutrients or proteins created by the gogi body
Term
Eukatyotic
Definition
contains organelles surrounded by membranes
most living organisms
Term
Prokaryotic
Definition
dont have structures surrounded by membranes few internal structures one celled organisms bacteria
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