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What determines the rhythm of your heart?
health.howstuffworks.com/human-body/systems/circulatory/heart-rhythm.htm
Your heart rhythm must be steady in order to be strong. Learn about your heart rhythm and find out what your heart does during every heartbeat.
Aromatherapy: Rosemary
health.howstuffworks.com/wellness/natural-medicine/aromatherapy/aromatherapy-rosemary.htm
Rosemary is a popular ingredient in aromatherapy preparations designed to ease pain and relieve congestion. Learn more about this essential oil.
Body Mass Index
health.howstuffworks.com/wellness/diet-fitness/weight-loss/bmi.htm
The number on the scale alone can't tell you whether you're at a healthy weight. Because height is also a factor, scientists came up with a mathematical formula called Body Mass Index (BMI). Learn how to calculate your BMI.
Aromatherapy: Clove
health.howstuffworks.com/wellness/natural-medicine/aromatherapy/aromatherapy-clove.htm
Clove can be used in aromatherapy preparations to soothe sore muscles or to fight infections when applied to the skin. Learn about this essential oil.
Aromatherapy: Fir
health.howstuffworks.com/wellness/natural-medicine/aromatherapy/aromatherapy-fir.htm
Fir can be used in aromatherapy preparations to reduce stress or to fight infections when applied to the skin. Learn more about this essential oil.
10 Reasons People Start Smoking
health.howstuffworks.com/wellness/smoking-cessation/10-reasons-people-start-smoking.htm
Do you know the reasons people start smoking? See our list of the 10 most common reasons people start smoking at HowStuffWorks.
Ultrafiltration
health.howstuffworks.com/medicine/tests-treatment/ultrafiltration.htm
Ultrafiltration is a medical therapy used to remove excess salt and water from the bodies of patients who have a condition called fluid overload.
How Marijuana Works
science.howstuffworks.com/marijuana.htm
Marijuana isn't just a recreational drug for hippies and philosophy majors -- its psychoactive history ranges from Egyptian mummies to modern U.S. politics. What's the big deal about this leafy, green plant?
How Emergency Rooms Work
people.howstuffworks.com/emergency-room.htm
Movies and TV shows depict emergency rooms as insanely intense places. But do you want to know what an emergency department in a hospital is really like? Learn all about what goes on in a real-life ER.
10 Oldest Known Diseases
science.howstuffworks.com/life/cellular-microscopic/10-oldest-known-diseases.htm
You won't find some of history's biggest killers on this list, but you will find at least one disease that will make you want to bite something and another that might make you break out in "elevated pustules." Curious yet?