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Chapter 2A
N/A
14
Science
7th Grade
02/19/2014

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Term
microscope
Definition
Tool that makes objects look larger than they really are.
Term
lens
Definition
Piece of curved glass or other clear material that causes light rays to come together or spread apart as they pass through.
Term
cell
Definition
The basic unit of structure and function in living things
Term
cell membrane
Definition
The structure that surrounds a cell
Term
cytoplasm
Definition
Gel-like substance inside the cell where most of the cell's activities take place.
Term
nucleus (nuclei)
Definition
Control center of a cell.
Term
nuclear membrane
Definition
Thin structure that surrounds and protects the nucleus.
Term
oganelle
Definition
Small structure in the cytoplasm that does a special job.
Term
mitochondria/ mitochondrion
Definition
Structure that releases energy for a cell. Part of the cell that gives energy.
Term
endoplasmic reticulum
Definition
Small network of tubes inside a cell that substances move along.
Term
ribosome
Definition
Small, round structure that makes protein.
Term
Golgi body
Definition
Organelle that packages and sends materials to other places in the cell.
Term
vacuole
Definition
Space in the cytoplasm that stores the different substances a cell needs to survive.
Term
lysosome
Definition
Small, round structure that breaks down nutrient molecules and old cell parts.
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