| A | B |
|---|
| cells | the basic units of structure and function in living things |
| cell theory | a widely accepted explanation of the relationship between cells and living things |
| unicellular | one-celled |
| multicellular | composed of many cells |
| tissue | group of similar cells that work together to perform a specific function |
| organ | made up of different types of tissues that work together |
| organ system | group of organs that work together to perform a major function |
| organelles | small structures inside the cell that carry out specific functions within the cell |
| cell wall | rigid layer of nonliving material that surrounds the cells of plants, helps protect and support the cell. |
| cell membrane | forms the outside boundary that seperates the cell from its environment, controls what substances come into and go out of a cell. |
| cytoskeleton | protein framework inside the cell that gives the cells their shape |
| mitochondria | powerhouses of the cell; convert food into energy the cell can use to carry out functions |
| endoplasmic reticulum | passageways that help form proteins and other materials , also carry material throughout cells |
| ribosomes | factories that produce proteins |
| golgi body | receive proteins and other newly formed materials from the endoplasmic reticulum, they then package and distribute materials to other parts of the cell |
| chloroplasts | only in plant cells, capture energy from sunlight and use it to produce food |
| vacuole | storage areas of cells |
| lysosomes | structures that contain chemicals that break down large food particles and old cell parts |
| proteins | large organic molecules that are made up of amino acids, found in meat, eggs, fish and nuts. |
| amino acids | 20 different kinds, make up proteins. |
| enzyme | type of protein that speeds up chemical reactions |
| nucleic acids | contian the instructions that cells need to carry out all the functions of life |
| DNA | type of nucleic acid that carries genetic information about and organism and is passed from parent to offspring |
| RNA | type of nucleic acid that plays and important role in the production of proteins |
