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Cell Membrane
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Thin outer wall that encloses the cell contents
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Cytoplasm
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Holds the organelles of the cell
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Lysosome
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Organelle that serves a digestive function for the cell
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Ribosome
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Site of protein formation; contains RNA
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Mitochondrion
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Converts netrients to energy in presence of oxygen
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Nucleus
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Control center of cell; contains DNA, which carries genetic information
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Antrum
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Any nearly closed cavity or chamber
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Apex
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The pointed extremith of a conical structure such as the heart
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Body
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The largest or most important part of an organ
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Fornix
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Any vaultlike or arched body
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Fundus
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Base or deeptes part of a hollow organ that is farthest from the mouth of the organ
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Hilum
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Recess, exit, or entrance of a duct into a gland or of nerves and vessels into an organ
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Lumen
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Space within an artery, vein, intestine, or tube
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Sinus
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Cavity or channel in bone, a dilated channel for blood, or cavity to permjit the escape of purulent material
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Vestibule
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Small space or cavity at the beginning of a canal
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