| A | B |
|---|
| cell theory | states that all organisms are made up of one or more cells, the cell is the basic unit of life, and all cells come from other cells |
| cell wall | tough, rigid, outer coverings that protect cells and give them shape |
| cell membrane | the protrective layer surrounding every cell and allows nutrients to move into the cell and allows waste to leave |
| cytoplasm | a gelatinlike substance that fill the inside of the cell. most of a cell's life processes occur in here. |
| ribosomes | small structure on which cells make their own proteins |
| organelles | structure in the cytoplasm of a eukaryotic cell that can act as a storage site, process energy, move materials, or manufacture substances |
| nucleus | organelle that controls all the activities of a cell and contains hereditary material made of DNA |
| chloroplasts | green, chlorophyll-containing, plant-cell organelle that captures light energy, which is used to make sugar |
| mitochondria | cell organelle where food is broken down, which releases energy |
| endoplasmic reticulum (ER) | cytoplasmic organelle that moves materials around in a cell and is made up of complex series of folded membranes; can be rough (with attached ribosomes) or smooth (without attached ribosomes) |
| golgi bodies | organelles that sort and package cellular materials and transport them within the cell or out of the cell |
| tissue | a group of similar cells that work together to do one job |
| organ | a structure made up of two or more different types of tissues that work together |
| organ system | a group of organs working together to perform a certain function |
