| A | B |
|---|
| light microscope | lets light pass through an object and then through two or more lenses. |
| electron microscope | uses views an object by using a magnetic field to bend beams of electrons |
| cell theory | observations and conclusions that proposed major ideas on cells: cells come from cells; organisms are made up of cells; smallest unit of an organism is a cell |
| cell membrane | the selectively permeable outer boundary of a cell that allows food and oxygen to move into the cell and wastes to leave it. |
| cytoplasm | the fluid material inside the cell membrane that contains structures that carry out life processes. |
| organelles | membrane-bound structures within the structures of eukaryotic cells |
| nucleus | a structure inside a cell that directs the cell's activities. |
| chromatin | long strands of DNA in a cell's nucleus. |
| endoplasmic reticulum | a cell organelle consisting of folded membranes that move materials around within the cell |
| ribosomes | a cell organelle on which protein is made |
| Golgi bodies | cell organelles consisting of stacks of membrane-covered sacs that pinch off and moveproteins to the outside of the cell |
| mitochondria | a cell organelle that breaks down food molecules and releases energy |
| lysosome | an organelle with chemicals that digest waste and worn-out cell parts |
| vacuole | a storage area in a cell for water, food, or waste products |
| cell wall | a rigid structure made of cellulose that surrounds a plant cell membrane to support and protect it. |
| chloroplast | a plant cell organelle in which light energy is changed inot chemical energy in the form of sugar during the process of photosynthesis |
| tissues | similar cells that do the same sort of work |
| organ | a structure made up of different types of tissue that work together to do a specific job |
| organ system | a group of organs working together for a specific job |
| rejection | a process by which the transplanted organ is attacked by the immune system of the receiving body |
