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| 3306695873 | cell | basic unit of all forms of life | 0 | |
| 3306695874 | cell theory | fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living thingl and that new cells are produced from existing cells | 1 | |
| 3306695875 | cell membrane | thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell | 2 | |
| 3306695876 | nucleus | structure that contains the cell's genetic material in the form of DNA | 3 | |
| 3306695877 | eukaryote | organism whose cells contain a nucleus | 4 | |
| 3306695878 | prokaryote | unicellular organism that lacks a nucleus | 5 | |
| 3306695879 | cytoplasm | in eukaryotic cells, all cellular contents outside the nucleus; in prokaryotic cells, all of the cell's contents | 6 | |
| 3306695880 | organelle | specialized structure that performs important cellular functions within a cell | 7 | |
| 3306695881 | vacuole | cell organelle that stores materials such as water, salts, proteins, and carbohydrates | 8 | |
| 3306695882 | lysosome | cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell | 9 | |
| 3306695883 | cytoskeleton | network of protein filaments in a eularyolic cell that gives the cell its shape and internal organization and is involved in movement | 10 | |
| 3306695884 | centriole | structure in an animal cell that helps to organize cell division | 11 | |
| 3306695885 | ribosome | cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell | 12 | |
| 3306695886 | endoplasmic reticulum | internal membrane system found in eukaryolic cells | 13 | |
| 3306695887 | golgi apparatus | organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticules for storage in the cell or release outside of the cell | 14 | |
| 3306695888 | chloroplast | organelle found in cells of plants and some other organisms that captures energy from sunlight and converts in into chemical energy | 15 | |
| 3306695889 | mitochondrion | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use | 16 | |
| 3306695890 | cell wall | strong, supporting layer around the cell membrane in some cells | 17 | |
| 3306695891 | lipid bilayer | flexible double layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings | 18 | |
| 3306695892 | selectively permeable | property of biological membranes that allows some substances to pass across it while others cannot | 19 | |
| 3306695893 | diffusion | process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated | 20 | |
| 3306695894 | facilitated diffusion | process of diffusion in which molecules pass across the membrane through cell membrane channels | 21 | |
| 3306695895 | aquaporin | water channel protein in a cell | 22 | |
| 3306695896 | osmosis | diffusion of water through a selectively permeable membrane | 23 | |
| 3306695897 | isotonic | when the concentration of two solutions is the same | 24 | |
| 3306695898 | hypertonic | when comparing two solutions, the solution with the great concentration of solutes | 25 | |
| 3306695899 | hypotonic | when comparing two solutions, the solution with the lesser concentration of solutes | 26 | |
| 3306695900 | osmotic pressure | pressure that must be applied to prevent osmotic movement across a selectively permeable membrane | 27 | |
| 3306695901 | homeostasis | relatively constant internal physical and chemical conditions that organisms maintain | 28 | |
| 3306695902 | tissue | group of similar cells that perform a particular function | 29 | |
| 3306695903 | organ | group of tissues that work together to perform closely related functions | 30 | |
| 3306695904 | organ system | group of organs that work together to perform a specific function | 31 | |
| 3306695905 | receptor | on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone | 32 |
