1. TheKingOPower

    This help me to my home work?

  2. xFryzeNxCoDx

    Great video!!!! THANKS!

  3. Batman

    Very good

  4. uselessrocky

    ahhh, right, you are!

  5. SuddenlyPsychotic

    Helped me so much

  6. JungleJones

    This is good stuff to learn about 

  7. LimeGreenSoda

    this helped me with my homework 

  8. MrTiagoRicci
  9. pacifier1995


  10. aranamor


  11. homelyspoiled

    Thanks this is a great introduction to the information I need to do a
    science project on the digestive system. (Grade 8 student)

  12. HoneycakeBlossom

    I love this video it makes me understand . Thank u guys good work

  13. LittleTrout

    I love the simple clear explanation thank you :)