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Unit 3 Part 1 Cells

Cell Organelles and Cellular Organization Life Science

TermDefinition
cell The smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm
organism A living thing; anything that can carry out life processes independently
cell membrane A phospholipid (fat) layer that forms a cell’s surface and acts as a barrier between the inside of a cell and the cell’s external (outside) environment
cytoplasm The region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
organelle One of the small bodies in a cell’s cytoplasm that are specialized to perform a specific function
nucleus In a eukaryotic cell, a membrane-bound organelle that contains the cell’s DNA and has a role in processes such as growth, metabolism, and reproduction of the cell
prokaryote A single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria
eukaryote An organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include protists, animals, plants, and fungi, but not archaea or bacteria
mitochondrion In eukaryotic cells, the organelle that is the site of cellular respiration, which releases energy for use by the cell
ribosome A cell organelle composed of RNA and protein; the site of protein synthesis
endoplasmic reticulum A system of membranes that are found in a cell’s cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
golgi complex (golgi body, golgi apparatus) A cell organelle that helps make and package materials to be transported out of the cell
vacuole A fluid-filled vesicle found in the cytoplasm of plant cells or protozoans
chloroplast An organelle found in plant and algae cells where photosynthesis occurs
lysosome A cell organelle that contains digestive enzymes
tissue A group of similar cells that perform a common function
organ A collection of tissues that carry out a specialized function of the body
organ system A group of organs that work together to perform body functions
structure The arrangement of parts in an organism
function The special, normal, or proper activity of an organ or part
Created by: jessica.watson
 

 



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