First week of human body.

Term Definition
single-celled organism an organism that only has one cell
bacteria a single celled organism without an organized nucleus
cell the basic unit of all living things
cell membrane the boundary the surrounds a cell and controls which substances can enter or leave the cell
cell nucleus an organelle in a cell that holds the cells DNA
cytoplasm The liquid inside of a living cell
micro organism an organism that is too small to see with your eyes
chloroplasts an organelle in a plant cell that turns energy from the sun into chemical energy for the plant to use
multi-celled organism (multicellular) an organism consisting of many cells
paramecium a single celled organism that is found in pond water. It looks like a grain of rice

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