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sspencer
Cells
19
Biology
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 cell division.
Term
Centriole
Definition
a bundle of microtubules 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 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(ER)
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 energy 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's activities.
Term
Organelle
Definition
a cell strucure that performs a specific function.
Term
Plasma Membrane(cell 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
Plastid
Definition
small structure that can store food (leucoplast) or pigment(chromoplast).
Term
Ribosome
Definition
tiny structure where proteins are synthesized.
Term
Vacuole
Definition
sac that stores water, nutrients, and other chemicals. The large vacuole found in plant cells helps the cells maintain their shape.
Term
Vesicle
Definition
small package of nutrients or proteins created by the Golgi apparatus.
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