| A | B |
|---|
| cell | the basic of a living organism that can perform all the processes associated with life. |
| cell theory | states all living things are made up of one or more cells, cells are the basic units of structure and function in living things, all cells come only from other living cells |
| cell membrane | the thin structure, made mostly of proteins and lipids, that encloses the cytoplasm and nucleus of plant and animal cells, makes homeostasis possible |
| plasma membrane | another term for cell membrane |
| homeostasis | ability of an organism to keep conditions inside its body the same even though conditions in the environment may change |
| cell wall | the stiff structure outside the cell membrane in a plant cell |
| cellulose | a complex compound formed from sugar molecules, a fiber in the cell wall |
| nucleus | The control center for most of a cell’s activities |
| cytoplasm | A jellylike substance that makes up all the living material in a cell except the nucleus |
| organelles | a tiny part of a cell having a special form and function; organelles carry out all life processes |
| mitochondria | an organelle that produces energy in the cell |
| ribosome | an organelle that produces protein for the cell |
| endoplasmic reticulum (ER) | An organelle that transports materials throughout a cell |
| golgi bodies | An organelle that manufactures and moves materials within a cell |
| lysosome | An organelle that breaks down food molecules, waste products, and old cells |
| chloroplast | An organelle in plant cells that contains chlorophyll |
| chlorophyll | Green pigment in plants that captures the sun’s energy for photosynthesis |
| cytoskeleton | support in a plant cell that helps it maintain its shape |
| tissue | a group of specialized cells in plants and animals that are organized to perform a certain function |
| organs | a group of tissues that work to perform a special function |
| organ system | a group of organs working together |
