What Is Heart Disease?

What Is Heart Disease?The heart is the center of the cardiovascular system. Through the body's blood vessels, the heart pumps blood to all of the body's cells. The blood carries oxygen, which the cells need. Cardiovascular disease is a group of problems that occur when the heart and blood vessels aren't working the way they should.Here are some of the problems that go along with cardiovascular disease:Arteriosclerosis (say: ar-teer-ee-oh-skluh-row-sus): also called hardening of the arteries, arteriosclerosis means the arteries become...

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NASA discovers black hole with 'heartbeat'

Houston: Soon after finding the largest black hole last week, NASA has now found another black hole, but it is the tiniest one and with a heart beat. A NASA satellite has detected what astronomers said was a "heartbeat" of what could be the smallest known black hole. The star-sucker could weigh less than three times the mass of the sun, placing it near the minimum...

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Black hole

Simulated view of a black hole (center) in front of theLarge Magellanic Cloud. Note the gravitational lensingeffect, which produces two enlarged but highly distorted views of the Cloud. Across the top, the Milky Way disk appears distorted into an arc.Objects whose gravity field is too strong for light to escape were first considered in the 18th century...

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