While traditional treatments restricted movement to injured muscles, today, we know that keeping muscles moving and improving circulation reduce pain and speed healing. That science inspired the …

The authors of chain emails often tell you to smile more, with the added claim that it takes more muscles to frown. Ever questioned this piece of wisdom? We have an answer for you.

How does the human body make electricity? Learn about the human body and its ability to make electricity and find out why electrical signals are so fast.

Exercise and Increased Blood Flow - As you exercise, your body increases blood flow to your working muscles. See how your nervous system gets the blood flow to the right place.

While women's lower body strength is often in line with that of men, their upper body strength can be half as much. Why is this, and are there any long-term benefits to this difference in muscle makeup?

Your Body's Response to Exercise - Exercise causes your muscles to act like electric motors. Learn how your muscles use ATP to generate force.

These cells then signal the respiratory centers to contract the respiratory muscles, causing you to sneeze or cough. Coughing and sneezing cause air to be rapidly and violently exhaled from the …

Fifteen facial muscles contract and stimulation of the zygomatic major muscle (the main lifting mechanism of your upper lip) occurs. Meanwhile, the respiratory system is upset by the epiglottis half …