Ava teaches her younger brother Noah that the brain is like a computer, controlling the body through the spinal cord and the nerves.
A boy named Jack who has just broken his leg teaches his younger sister Lissa all the things he learned about bones while at the doctor's office getting his cast.
After getting their heart rates up while on a bike ride, a boy named Rico teaches his younger sister Rosa about the heart.
A girl named Jasmine teaches a younger student at her school everything she has learned about lungs and the respiratory system while researching them for her booth at her school’s Science Fair.
A boy named Lucas has injured his calf muscle in PE class. Lucas and his classmate Mia discuss the body’s muscles.
Tim and insists on telling his sister Grace all about the digestive system while their father is sick with a stomachache.
his book discusses how the main job of the circulatory system is to deliver oxygen and nutrients to the body. The heart, blood vessels, and blood make up the circulatory system. Reading Essentials in Science.