six levels of body organization

• Molecules are the basic chemical building blocks of the body, with their structure usually lending to a certain function.
• Cells provide the basic and functional unit of the body.
• Tissues build up the organs.
• The nature of the cells and materials that compose the tissue determine the function of the organ.
• Organs are used to perform one or more functions in conjunction with other organs.
• Organ systems perform a function.