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Chapter 2, Section 4
Vocabulary
11
Science
6th Grade
10/15/2009

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Term
organelle
Definition
a tiny cell structure that carries out a specific function within the cell
Term
cell wall
Definition
a rigid layer of nonliving material that surrounds the cells of plants and some other organisms
Term
cell membrane
Definition
the outside cell boundary that controls which substances can enter or leave the cell
Term
cytoplasm
Definition
the material within a cell apart from the nucleus
Term
mitochondria
Definition
red-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its function
Term
endoplasmic reticulum
Definition
a cell structure that forms passageways in which proteins and other materials are carried through the cell
Term
ribosome
Definition
a small grain-like structure in the cytoplasm of a cell where proteins are made
Term
Golgi body
Definition
a structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell
Term
chloroplast
Definition
a structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food
Term
vacuole
Definition
a sac inside a cell that acts as a storage area
Term
lysosome
Definition
a small, round cell structure containing chemicals that break down large food particles into smaller ones
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