7.L.1.3 Summarize the hierarchical organization of multi-cellular organisms from cells to tissues to organs to systems to organisms.
7.L.1.4 Summarize the general functions of the major systems of the human body (digestion, respiration, reproduction, circulation, and excretion) and ways that these systems interact with each other to sustain life.


  • Levels of organization slide show on Study Jams.  Be sure to read the captions of the pictures to gain understanding of what you are seeing.
  • Digestive system slide show on Study Jams.  Excellent resource to help you understand the parts of the digestive system and their functions.
  • Need to learn the parts of the digestive system?  Go to this interactive game.  How fast can you get them all?
  • This site provides details on how food moves and is digested.  Advanced level of identified parts for digestion.
  • This TedEd video is excellent easy to follow video.
  • Want more practice with identifying the parts of the digestive system?  Try this one out.
  • Digestion song video
  • TED ed video on Kidneys
  • Simplified video on urinary/excretory system. (A funnier version is here.)
  • Excretory video that recaps all sources of excretion and urinary system.
  • Did you say where are the games?  This review of excretory system is a real game you get to play as you answer correctly.  (A few questions need clarified:  skin, liver and kidneys are involved with excretory system; the kidney filters your blood, makes urine; the excretory system removes wastes; the stomach is not part of the excretory system.)
  • Yep.  Song time for urinary system.
  • Respiratory system slide show on Study Jams.  Great image of alveoli.
  • Circulatory system video on Study Jams.  Note:  your blood is never blue!  (That’s right the video is wrong on this point.)  It is colored that way to indicate oxygen poor blood to make the path less confusing.  When you get your blood drawn by the doctor, they access your vein.  This blood is dark red.
  • Mayo Clinic circulatory system video.  Very technical with key terms but simply explained.
  • Circulatory rap that will get you moving.
  • Circulatory review games
  • Discovery Education Science Techbook has every unit we are studying.  Videos, interactives, simple to read text.
  • Study Jams Video:  Skeletal system
  • Axial vs. Appendicular skeletal system
  • Kids Health website for bones and skeletal system
  • Study Jams Video:  Muscular System
  • Study Jams Video:  Nervous System
  • Study Jams Video:  Immune System
  • Kids Health Video on The Brain and nervous system
  • Review all body systems with this visually connecting text
  • What do the glands of the endocrine system do?  Check here to find out.