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6th grade

cell the basic unit of structure and function in a living thing
cell membrane forms the outside boundary of the cell
nucleus the control center that directs the cell's activities
What are the levels of organization in the human body from smallest to greatest unit? cells, tissues, organs, and organ systems
organ systems the human body is made up of eleven organ systems: circulatory, digestive, nervous, skeletal, endocrine, muscular, excretory, respiratory
muscle tissue can contract or shorten--muscle tissue makes parts of your body move
nervous tissue carries electrical messages back and forth between the brain and other parts of the body
Created by: dianadarlene