the tiny "factories" inside cells

the unit from which all organisms are made

a living thing, capable of making and using energy, reproducing, growing and changing, responding to its environment and getting rid of wastes

tissues combine to form these; the heart is an example of one

cells combine to form this; bone, muscle and nerves are examples

made up of only one cell

an organism that can only be seen with a microscope

tiny "tails" on some microorganisms that help them move