click below
click below
Normal Size Small Size show me how
Biology Chapter 4-2
Term | Definition |
---|---|
plasma membrane | or cell membrane, the cells outer boundary |
cytoplasm | the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus |
cytosol | the soluble portion of the cytoplasm which includes molecules and small particles, such as ribosomes, but not the organelles covered in membranes |
nucleus | in physical science, an atom's central region, which is made up of protons and neutrons. |
prokaryote | a single celled organism that has no nucleus and no membrane- bound organelles examples include bacteria and archaea |
eukaryote | an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; they include plants, animals, and fungi but not bacteria or archaea |
organelle | one of the small bodies that are found in the cytoplasm of a cell and that are specialized to do a specific function. |
tissue | a collection of specialized cells and cell products that preform a specific function |
organ | a collection of tissues that carry out a specialized function of the body. |
organ system | a collection of organs working together to preform a specific function |