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CELL MEMBRANE
membrane mainly composed of protein and lipid molecules
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RIBOSOMES
particles composed of protein and RNA molecules
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ENDOPLASMIC RETICULUM
complex of connected, membrane-bound sacs, canals and vesicles
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GOLGI APPARATUS
group of flattened, membranous sacs
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MITOCHONDRIA
- membranous sacs with inner partitions
- release
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membranous sacs
contain enzymes capable of digesting worn cellular parts of substances that enter cells
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PEROXISOMES
- membranous vesicles
- contain enzymes called peroxidases, important in the breakdown of many organic molecules
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CENTROSOME
- nonmembranous structure composed of two rodlike centrioles
- helps distribute chromosomes to new cells during cell division, intiates formation of cilia
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CILIA
- motile projections attached to basal bodies beneath the cell membrane
- propel fluids over cellular surface
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