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Glossary of Cell Key Terms

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cell
smallest unit of living matter
cell membrane
thin, flexible layer that protects the cell and regulates what enters and leaves it.
cytoplasm
gel area between the cell membrane and the nucleus
mitochondria
rod-shaped organelles that produce most of the cell's energy
nucleus
directs all cell activities
cell wall
stiff outer wall that gives plant cells a box-like shape
vacuole
sac that stores food, water, wastes and other materials
endoplasmic reticulum - E.R.
maze of passageways that carry materials throughout the cell
ribosomes
scall factories that produce protein
Golgi bodies
take materials from the E.R. to other parts of the cell
lysosomes
small organelles in some animal cells that break down food particles and waste
chloroplast
organelles in plant cells that capture energy from sunlight and use it to produce food for the cell
chromatin
strands that contain the genetic material/instructions that direct the cell
nucleolus
small structure inside the nucleus where ribosomes are made

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