Cell: The basic unit of structure and function in living things
Cell Membrane: A thin flexible barrier that surrounds a cell and controls which substances pass into and out of a cell
Cell Wall: A rigid supporting layer that surrounds the cells of plants and some other organisms
Organelle: A tiny cell structure that carries out a specific function within the cell
Tissue: Any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products
Organ: A part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.
Unicellular: Made of a single cell.
Multicellular: Consisting of many cells.
Autotroph: An organism that is able to capture energy from sunlight or chemicals and use it to produce it's own food.
Heterotroph: An organism that can not make its own food and gets food by consuming other living things.
Prokaryotic: A unicellular organism that lacks a nucleus and some other cell structures.
Eukaryotic: An organism whose cells contain a nucleus.