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Biology Chapter 4.2

TermDefinition
Plasma Membrane The cell's outer boundary (also known as cell membrane).
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 with membranes.
Nucleus In physical science, an atom's central refion, which is made up of protons and neutrons.
Prokaryote A single-celled organism that has no nucleus and has 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 animals, plants, 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 perform a specific function.
Tissue A collection of specialized cells and cell products that perform a specific function.
Organ A collection of tissues that carry out a specialized function of the body.
Organ System A group of organs that accomplish related tasks.
Created by: DragonT20