Understanding what makes captive gorilla hearts tick

We've known for some time that heart disease is prevalent in captive gorilla populations and is a leading cause of death. This is why, in 2010, the Great Ape Heart Project based at Zoo Atlanta was formed. The project provides ...

Tapping into the way cells communicate

A new technology discovered by UConn School of Dental Medicine researchers records cellular communication in real time—providing a closer look into the dynamics of cell secretion and a greater understanding of how cells ...

Medical groups warn climate change is a 'health emergency'

As Democratic presidential hopefuls prepare for their first 2020 primary debate this week, 74 medical and public health groups aligned on Monday to push for a series of consensus commitments to combat climate change, bluntly ...

High temperature records will be 'smashed' in coming century

Climate change will cause some regions of the world to "smash" high temperature records every year in the coming century, researchers warn. That will push "ecosystems and communities beyond their ability to cope," according ...

Wearable device reveals how seals prepare for diving

A wearable non-invasive device based on near-infrared spectroscopy (NIRS) can be used to investigate blood volume and oxygenation patterns in freely diving marine mammals, according to a study publishing June 18 in the open-access ...

How satellites can improve the health of city dwellers

Most people get a health boost from exercise. But for those with heart disease or a lung condition such as asthma, exercising during periods of high urban air pollution can exacerbate rather than improve their condition.

Posture impacts how you perceive your food

Summertime is often filled with outdoor parties and food trucks, meaning you're spending more time standing up and eating. But if you want to actually enjoy your meal, researchers say you're better off finding a seat.

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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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