Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin. This explains why they appear pale when a person is anaemic or has lost a great deal of blood.
 | 3 Quick And Dirty Tips To Prevent Running Injuries For Good |
 | Which Cardio Workouts Burn the Most Calories? |
 | The Best Gear For Running In The Dark |
 | 7 Reasons to Consider a Pescatarian Diet |
