Book excerpt: These simple and engaging biology experiments use easy-to-obtain household materials to explore the science behind the human body. Readers are guided through applying the scientific method to conduct experiments, which include observing the effect of body position and exercise on heart rate, breathing rate, and blood pressure; building a model of the human eye; and figuring out how food moves through the body. Clear instructions and scientific illustrations will allow students to gain a better understanding of the basic biological concepts demonstrated by each experiment. This book also contains safety tips to educate students on the code of conduct expected when conducting experiments.