Being physically fit is more important than your body weight in lowering the risk of death and heart disease, a recent study ...

Every part of your body needs oxygen to function properly. The main job of your respiratory system is to make sure that happens—it’s responsible for circulating fresh air throughout your body and ...

Galaxies avoid an early death because they have a 'heart and lungs' which effectively regulate their 'breathing' and prevent them growing out of control, a new study suggests. If they didn't, the ...