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How Blood Works
health.howstuffworks.com/human-body/systems/circulatory/blood.htm
Blood is the most commonly tested part of the body, and it is truly the river of life. Learn about red and white blood cells, lymphocytes, blood tests, blood types and blood donation.
How Your Kidneys Work
health.howstuffworks.com/human-body/systems/kidney-urinary/kidney.htm
The kidneys perform several important tasks. Learn about kidney processes and how the kidneys maintain water volume and balance and regulate blood composition.
Aspirin 101
health.howstuffworks.com/medicine/medication/aspirin.htm
Aspirin and its relatives are used to relieve all kinds of ailments. Learn about the history and chemistry of aspirin, how aspirin works against pain and aspirin side effects.
How Muscles Work
health.howstuffworks.com/human-body/systems/musculoskeletal/muscle.htm
Muscles are your body’s engine, and you couldn’t do anything without them. Learn about skeletal muscle, smooth muscle, and cardiac muscle and how muscle contraction works.
How do fried foods affect my risk for high cholesterol?
Fried foods and cholesterol are commonly linked to one another. Learn about fried foods and cholesterol at Discovery Health.
Exactly why is your thyroid so important?
health.howstuffworks.com/human-body/systems/endocrine/why-thyroid-important.htm
The thyroid gland works to communicate with various parts of the body. Learn more about the thyroid gland and how it sends messages.
How the Obesity Paradox Works
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The obesity paradox shows that people with chronic obesity have a greater chance of survival than normal-weight people. Learn about the obesity paradox.
Depression Overview
health.howstuffworks.com/mental-health/depression/facts/depression.htm
Understanding how depression works can help improve daily life and health problems. Learn about how depression works, from causes to treatments.
How Your Lungs Work
health.howstuffworks.com/human-body/systems/respiratory/lung.htm
You couldn't breathe without your lungs and you do it without even thinking about it. So, how do your lungs manage this amazing feat?
How does your body digest a cigarette?
health.howstuffworks.com/wellness/smoking-cessation/digest-a-cigarette.htm
Can you body really digest a cigarette? Not really -- those chemicals just aren't useful for its functions. Find out how your body digests a cigarette.