Fewer fish, worse health: The climate effect

Over the next 25 years, reduced intake of marine food resources due to climate change will likely have a negative impact on the cardiovascular health of First Nations on Canada's Pacific coast, a new study suggests.

Measurement uncertainty may stall global biodiversity targets

More than ever before, there is a growing interest in dedicating resources to stop the loss of biodiversity, as recently exemplified by the Kunming-Montreal Global Biodiversity Framework (GBF) decided at COP15 in December ...

ALMA gets a new hydrogen maser

The Atacama Large Millimeter/submillimeter Array (ALMA) has just received a "heart transplant," high in the Atacama Desert in Northern Chile. ALMA, the most complex astronomical observatory ever built on Earth, installed ...

Biden strengthens US soot regulations, angering industry

President Joe Biden's administration on Wednesday announced tough new air quality standards it said were sorely needed to protect the health of vulnerable communities, though industry groups have said the move would harm ...

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Heart

The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."

The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

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