LEVELS OF STRUCTURAL ORGANIZATION IN THE HUMAN BODY

• chemical level

  • atoms
  • carbon
  • hydrogen
  • oxygen
  • phosphorus
• molecule

  • DNA
• cellular level

  • smooth muscle cell
• tissue level

  • smooth muscle tissue
• organ level

  • epithelial and connective tissues
  • smooth muscle tissue layers
  • epithelial tissue
  • stomach
• system level

  • salivary glands
  • mouth
  • pharynx (throat)
  • esophagus
  • stomach
  • liver
  • pancreas (behind the stomach)
  • gallbladder
  • large and small intestines
• organismal level - any living individual, can be compared to a book in our analogy.