Organization of the Body

Organization of the body:  It all starts off at the chemical level.  In the chemical level, atoms combine to form molecules.  Molecules then associate in specific ways to form organelles.  Organelles form tissues.  (Forms 4 different types of tissue: epithelium, muscle, connective tissue, and nervous tissue.) Tissues then form organs.  An organ is a discrete structure composed of at least two tissue types that performs a specific function for the body.  Organs work together to accomplish a common purpose make up an organ system.  Many organ systems that work together make up the organismal level.  The organismal level represents the sum total of all structural levels working together to promote life!