What is he doing?
eating pizza = digestion
What is this? What is it for?
stomach / digestion
What is she doing?
breathing = respiration
What are these? What are they for?
lungs / respiration
What is this? What is it for?
heart / circulation
What is this?
blood flowing = circulation
What is this?
digestion
What are these? What are they for?
teeth / digestion
What is this? What is it for?
nose / respiration
What is this? What is it for?
blood / blood donation = circulation
What is this? What is it for?
oxygen / respiration
What are these? What are they for?
blood vessels = circulation
