Where in the human body would you find the malleus? How much tear fluid does the average person produce each day? What happens to the body when we laugh? In this accessible and fascinating examination, readers discover the answers to these questions and many more. How the Body Works navigates readers all around the body, from head to toe, inside and out, explaining not just its usual workings, but also how the body responds to the strains we put it under: what happens when we exercise, or become stressed or drink caffeine. Arranged according to the body’s different structures and systems, How the Body Works comes with over 1500 fully annotated color photographs, medical imaging and artworks. From the brain to the heart to the elbow, from the left ventricle to the cranial nerves, from how we hear to how we age, How the Body Works is a highly detailed but simply written, comprehensive guide that will appeal to general readers and students alike.