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Cells Review
Organelles and terms to study for Cells Test!
Term | Definition |
---|---|
unicellular | an organism made of one cell (ex- bacteria) |
multicellular | an organism composed of more than one cell |
cell | the basic unit (of structure and function) in living things |
organelle | a tiny cell structure or part that carries out a specific job in the cell |
cell wall | a strong or rigid layer that surrounds the cells of plants; provides shape, support, and strength |
cell membrane | a cell part that controls which substances can enter or leave the cell |
nuclear membrane | protects the nucleus and allows materials to pass into and out of the nucleus |
nucleus | directs and controls all cell activity |
chromosomes | contain the DNA or genetic material |
nucleolus | where ribosomes are made |
ribosome | where proteins are made |
endoplasmic reticulum (E.R.) | passageways that carry or transport protein and other materials from one part of the cell to another |
golgi bodies | receive proteins and other materials and packages them, and distributes them to other parts of the cell |
mitochondria | an organelle that uses food molecules and changes it into energy for the cell to use |
chloroplasts | found only in plant cells that captures energy from the sun to be used in photosynthesis |
vacuole | stores food, water, and wastes in a cell; it is larger in plant cells |
lysosome | this is found only in animal cells; contains chemicals to help break down food and old cell parts |
centrosome | found only in animal cell; organelle that helps in cell division |
cytoplasm | gel-like fluid that holds other organelles |
water | this is not an organelle but cells need this for chemical reactions to occur, to move substances around, to regulate temperature, and to maintain size and shape |
tissue | a group of similar cells that work together to do a specific function or job |
organ | different kinds of tissue that work together to perform a function |
organ system | groups of organs that work together to perform a major function |
First you have a cell...then cells come together to form a tissue...then tissues come together to form... | an organ ....organs come together to form organ systems |