For centuries, scientists believed the human body had two major circulation systems. One was the cardiovascular system that moves blood through arteries and veins. The other was the lymphatic system ...

Some discoveries change the way we view the human body. In 2021, researchers described what they saw when they had examined skin-biopsy samples that included tattoos: The ink particles had traveled ...

We look into the body’s circulatory systems. By Sam Sifton I’m the host of The Morning. We’ve long known about two systems in the human body that circulate fluids. A physician in Italy observed the ...

Your body may signal poor circulation through temperature every day. Here's what the signs mean and the natural fixes that actually work.

Come along children, we’ve come to the hospital to learn how blood is moved around the body in the circulatory system. These humans are donating blood. The average adult has about 5 litres of the ...

Exercising regularly is one of the best things you can do to control your blood pressure. You should aim for at least 150 ...

Mar. 18, 2026 Your morning coffee or tea could be quietly supporting your brain health. A long-term study found that moderate consumption of caffeinated coffee or tea was linked to an 18% lower risk ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Erika Rasure is globally-recognized as a leading consumer economics subject matter expert, researcher, and ...

Cold hands and leg cramps may signal poor circulation. Here's what the 2026 research says and the natural fixes worth trying ...

As the central part of the circulatory system, the heart is responsible for pumping blood, supplying oxygen and nutrients, and removing metabolic waste such as carbon dioxide from all the tissues in ...

The heart has four chambers that contract and relax in a specific rhythm to oxygenate blood and pump it throughout the body. The heart’s electrical system coordinates muscle contractions to maintain a ...