6th Grade- Ch. 8 Cells
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jbsscience on September 8, 2011
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Chapter Vocab
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22 terms
Terms | Definitions |
|---|---|
 organism | any living thing |
| cell | the smallest unit of an organism that carries on the functions of life |
| homeostasis | The regulation of an organism's internal, life maintaining condition |
| binomial nomenclature | two word naming system that Linnaeus used |
| phylogeny | the evolutionary history of an organism |
| kingdom | largest group in classification system |
| cell theory | All organisms are made up of one of more cells; the cell is the basic unit of organization in organisms |
| cell walls | tough, rigid outer coverings that protect cells and give them shape |
| cell membrane | protective layer surrounding every cell |
| cytoplasm | the gelatinlike substance that constantly flows inside the cell membrane |
| ribosomes | cells make their own proteins on these small structures |
| organelles | tiny organs in the cell |
| nucleus | directs all cell activites |
| chloroplasts | food in plants cells is made in these green organelles |
| mitochondria | energy in food is released here where it is broken down into carbon dioxide and water |
| endoplasmic reticulum | a series of folded membranes in which materials can be processed and moved around the inside of the cell |
| Golgi bodies | sort proteins and other cellular substances and package them into membrane bound structures called vesicles |
| lysosome | organelle that contains digestive chemicals that help break down |
| vaculoes | storage unit in the cell for wastes and other materials |
| tissue | a group of similar cells that work together |
| organ | a structure made up of two or more different types of tissues |
| organ system | a group of organs working together to preform a certain function |
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