Rebeca Rubio reveals that the transverse abdominis, not traditional crunches, is the secret to a flat stomach. She suggests ...

The outer oblique muscles start midway down your ribcage and stretch to your hips on each side of your body. The internal obliques are nestled underneath them. These abdominal muscles allow you to ...

The digestive system is the series of tubelike organs that convert our meals into body fuel ... chyme—is sealed in the stomach by two ringlike sphincter muscles for several hours and then ...

The stomach muscles help to mix and break the food down ... These are important for breaking down the food so it can be absorbed by the body. After it leaves the stomach, the partially-digested ...

Find out about the different stages of a human ... muscles work? Find out how our muscles help us move by contracting and relaxing. What is the digestive system? Discover how the food gets into ...

Whenever I see people enter these crazy speed competitions, I always wonder what happens to the body and the digestive system during it. Well, PBS Nova spoke with physiology experts and competitors to ...