Sodium-Potassium pump

http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pump_works.html

Flowers

https://www.dkfindout.com/uk/animals-and-nature/plants/parts-flower/

https://es.slideshare.net/mobile/ksumatarted/optical-illusion-9395247

  

http://www.childrensuniversity.manchester.ac.uk/interactives/science/brainandsenses/eye/

Human senses

http://www.dkfindout.com/uk/human-body/senses/. 
http://faculty.washington.edu/chudler/introb.html.  

Plants

  http://www.dkfindout.com/uk/animals-and-nature/plants/

http://www.sciencekids.co.nz/plants.html
Videos
http://www.neok12.com/Plants.htm

The nervous system and drugs

ENDOCRINE SYSTEM

QUIZZ:
http://kidshealth.org/en/kids/esquiz.html

The science of stress;
http://youtube.com/embed/RyP8L3qTW9Q?wmode=transparent