Breathe. Within seconds, the oxygen you took in is cruising throughout your body.
Oxygen is carried by fast-flowing rivers of blood. What powers that bloodstream? Feel the answer for yourself. Just put your hand on your chest. Beneath the skin and bone lies a thumping, pumping muscle—your heart.
Heart Diagram
Left Atrium
Receives oxygen-rich blood from the lungs
Right Atrium
Receives “used” blood from throughout the body
Right Ventricle
Pumps blood to the lungs to pick up oxygen
Left Ventricle
Pumps oxygen-rich blood throughout the body
Amanda Bereny/Selavy Studios (heart chambers)