Some pretty unusual things can cause strokes.
Inside your body there’s a bustling highway with your beating heart at the center. Learn all about your body’s 60,000 miles of microscopic blood vessels, 5 to 6 quarts of blood, and the sundry passengers (lymph, blood cells, nutrients and more) that ride it every day.
Exactly how Lyme disease bacteria move inside human blood vessels to spread throughout the body has remained largely a mystery, until now.
Inhaling secondhand marijuana smoke even for just 1 minute may temporarily affect how blood vessels function, according to a new study done in rats.
Astronauts who fly far beyond the Earth are more likely to experience heart problems than those whose missions are closer to home — and the cause may be deep-space radiation, a new study finds.
After the June 12 shooting in Orlando, many gay and bisexual men who wanted to donate blood were unable to do so.
On May 20, tourists on an Australian cruise witnessed an incredible, albeit somewhat gruesome, sight.
'Silent' heart attacks are nearly as common as heart attacks with symptoms — and almost as deadly as well.
A new Kickstarter project aims to create a virtual-reality T-shirt that gives people an inside peek into the circulatory, skeletal and digestive systems.