Organelles

Terms	Definitions
Prokaryote	cells that have no defined nucleus and few organelles.
Eukaryote	cells that have a membrane bound nucleus and membrane bound organelles
Organelle	specialized internal structure within a cell
Nucleus	contains nearly all the cells DNA.
Ribosome	site of protein assembly
Endoplasmic recticulum	is a network of folded membranes, It is the "highway system" for the cell and is used to transport supplies throughout the cell
Golgi apparatus	modifies, sorts and packages proteins and other materials from the ER for storage or secretion out of the cell
Lysosome	small organelles; digest or break down molecules that can be used by the cell. Remove old "junk" that is useless.
Vacuole	stores materials such as water, salts, enzymes. Large structures rarely found in animal cells.
Mitochondria	convert chemical energy stored in food into compounds that are more convenient for the cell to use.
Chloroplast	only found in plant cells; convert sunlight into chemical energy for the cell
Microfilaments and microtubles	help maintain the shape of the cell; provide internal support and structure
Cell membrane	regulates what enters and leaves the cell and provides protection and support
Cell wall	provides protection and support to plant cells.

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